diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 0b54783..bb435d8 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -206,4 +206,5 @@
 sdk {
     name: "tethering-module-sdk",
     bootclasspath_fragments: ["com.android.tethering-bootclasspath-fragment"],
+    systemserverclasspath_fragments: ["com.android.tethering-systemserverclasspath-fragment"],
 }
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index 9c0722a..9bbf3d5 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -22,14 +22,14 @@
 // different value depending on the branch.
 java_defaults {
     name: "ConnectivityNextEnableDefaults",
-    enabled: false,
+    enabled: true,
 }
 apex_defaults {
     name: "ConnectivityApexDefaults",
     // Tethering app to include in the AOSP apex. Branches that disable the "next" targets may use
     // a stable tethering app instead, but will generally override the AOSP apex to use updatable
     // package names and keys, so that apex will be unused anyway.
-    apps: ["Tethering"], // Replace to "Tethering" if ConnectivityNextEnableDefaults is false.
+    apps: ["TetheringNext"], // Replace to "Tethering" if ConnectivityNextEnableDefaults is false.
 }
 // This is a placeholder comment to avoid merge conflicts
 // as the above target may have different "enabled" values
@@ -44,8 +44,8 @@
     bootclasspath_fragments: [
         "com.android.tethering-bootclasspath-fragment",
     ],
-    java_libs: [
-        "service-connectivity",
+    systemserverclasspath_fragments: [
+        "com.android.tethering-systemserverclasspath-fragment",
     ],
     multilib: {
         first: {
@@ -91,6 +91,7 @@
     name: "com.android.tethering-bootclasspath-fragment",
     contents: [
         "framework-connectivity",
+        "framework-connectivity-tiramisu",
         "framework-tethering",
     ],
     apex_available: ["com.android.tethering"],
@@ -112,11 +113,18 @@
     // Additional hidden API flag files to override the defaults. This must only be
     // modified by the Soong or platform compat team.
     hidden_api: {
+        max_target_r_low_priority: ["hiddenapi/hiddenapi-max-target-r-loprio.txt"],
         max_target_o_low_priority: ["hiddenapi/hiddenapi-max-target-o-low-priority.txt"],
         unsupported: ["hiddenapi/hiddenapi-unsupported.txt"],
     },
 }
 
+systemserverclasspath_fragment {
+    name: "com.android.tethering-systemserverclasspath-fragment",
+    standalone_contents: ["service-connectivity"],
+    apex_available: ["com.android.tethering"],
+}
+
 override_apex {
     name: "com.android.tethering.inprocess",
     base: "com.android.tethering",
diff --git a/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority.txt b/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority.txt
index 1f49d1b..ea0f61a 100644
--- a/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority.txt
+++ b/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority.txt
@@ -1163,6 +1163,93 @@
 Landroid/net/NetworkWatchlistManager;->reportWatchlistIfNecessary()V
 Landroid/net/NetworkWatchlistManager;->SHARED_MEMORY_TAG:Ljava/lang/String;
 Landroid/net/NetworkWatchlistManager;->TAG:Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;-><init>()V
+Landroid/net/nsd/DnsSdTxtRecord;-><init>(Landroid/net/nsd/DnsSdTxtRecord;)V
+Landroid/net/nsd/DnsSdTxtRecord;-><init>([B)V
+Landroid/net/nsd/DnsSdTxtRecord;->contains(Ljava/lang/String;)Z
+Landroid/net/nsd/DnsSdTxtRecord;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/nsd/DnsSdTxtRecord;->get(Ljava/lang/String;)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->getKey(I)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->getRawData()[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValue(I)[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValue(Ljava/lang/String;)[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValueAsString(I)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->insert([B[BI)V
+Landroid/net/nsd/DnsSdTxtRecord;->keyCount()I
+Landroid/net/nsd/DnsSdTxtRecord;->mData:[B
+Landroid/net/nsd/DnsSdTxtRecord;->mSeperator:B
+Landroid/net/nsd/DnsSdTxtRecord;->remove(Ljava/lang/String;)I
+Landroid/net/nsd/DnsSdTxtRecord;->set(Ljava/lang/String;Ljava/lang/String;)V
+Landroid/net/nsd/DnsSdTxtRecord;->size()I
+Landroid/net/nsd/INsdManager$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/nsd/INsdManager$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->getMessenger()Landroid/os/Messenger;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->setEnabled(Z)V
+Landroid/net/nsd/INsdManager$Stub;-><init>()V
+Landroid/net/nsd/INsdManager$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/nsd/INsdManager$Stub;->TRANSACTION_getMessenger:I
+Landroid/net/nsd/INsdManager$Stub;->TRANSACTION_setEnabled:I
+Landroid/net/nsd/INsdManager;->setEnabled(Z)V
+Landroid/net/nsd/NsdManager;-><init>(Landroid/content/Context;Landroid/net/nsd/INsdManager;)V
+Landroid/net/nsd/NsdManager;->BASE:I
+Landroid/net/nsd/NsdManager;->checkListener(Ljava/lang/Object;)V
+Landroid/net/nsd/NsdManager;->checkProtocol(I)V
+Landroid/net/nsd/NsdManager;->checkServiceInfo(Landroid/net/nsd/NsdServiceInfo;)V
+Landroid/net/nsd/NsdManager;->DBG:Z
+Landroid/net/nsd/NsdManager;->DISABLE:I
+Landroid/net/nsd/NsdManager;->disconnect()V
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES:I
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES_FAILED:I
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES_STARTED:I
+Landroid/net/nsd/NsdManager;->ENABLE:I
+Landroid/net/nsd/NsdManager;->EVENT_NAMES:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->fatal(Ljava/lang/String;)V
+Landroid/net/nsd/NsdManager;->FIRST_LISTENER_KEY:I
+Landroid/net/nsd/NsdManager;->getListenerKey(Ljava/lang/Object;)I
+Landroid/net/nsd/NsdManager;->getMessenger()Landroid/os/Messenger;
+Landroid/net/nsd/NsdManager;->getNsdServiceInfoType(Landroid/net/nsd/NsdServiceInfo;)Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->init()V
+Landroid/net/nsd/NsdManager;->mAsyncChannel:Lcom/android/internal/util/AsyncChannel;
+Landroid/net/nsd/NsdManager;->mConnected:Ljava/util/concurrent/CountDownLatch;
+Landroid/net/nsd/NsdManager;->mContext:Landroid/content/Context;
+Landroid/net/nsd/NsdManager;->mHandler:Landroid/net/nsd/NsdManager$ServiceHandler;
+Landroid/net/nsd/NsdManager;->mListenerKey:I
+Landroid/net/nsd/NsdManager;->mListenerMap:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->mMapLock:Ljava/lang/Object;
+Landroid/net/nsd/NsdManager;->mService:Landroid/net/nsd/INsdManager;
+Landroid/net/nsd/NsdManager;->mServiceMap:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->nameOf(I)Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->NATIVE_DAEMON_EVENT:I
+Landroid/net/nsd/NsdManager;->nextListenerKey()I
+Landroid/net/nsd/NsdManager;->putListener(Ljava/lang/Object;Landroid/net/nsd/NsdServiceInfo;)I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE:I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->removeListener(I)V
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE:I
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->SERVICE_FOUND:I
+Landroid/net/nsd/NsdManager;->SERVICE_LOST:I
+Landroid/net/nsd/NsdManager;->setEnabled(Z)V
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY:I
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY_FAILED:I
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->TAG:Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE:I
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdServiceInfo;-><init>(Ljava/lang/String;Ljava/lang/String;)V
+Landroid/net/nsd/NsdServiceInfo;->getTxtRecord()[B
+Landroid/net/nsd/NsdServiceInfo;->getTxtRecordSize()I
+Landroid/net/nsd/NsdServiceInfo;->mHost:Ljava/net/InetAddress;
+Landroid/net/nsd/NsdServiceInfo;->mPort:I
+Landroid/net/nsd/NsdServiceInfo;->mServiceName:Ljava/lang/String;
+Landroid/net/nsd/NsdServiceInfo;->mServiceType:Ljava/lang/String;
+Landroid/net/nsd/NsdServiceInfo;->mTxtRecord:Landroid/util/ArrayMap;
+Landroid/net/nsd/NsdServiceInfo;->setTxtRecords(Ljava/lang/String;)V
+Landroid/net/nsd/NsdServiceInfo;->TAG:Ljava/lang/String;
 Landroid/net/ProxyInfo;-><init>(Landroid/net/ProxyInfo;)V
 Landroid/net/ProxyInfo;-><init>(Landroid/net/Uri;)V
 Landroid/net/ProxyInfo;-><init>(Landroid/net/Uri;I)V
diff --git a/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt b/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt
new file mode 100644
index 0000000..211b847
--- /dev/null
+++ b/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt
@@ -0,0 +1 @@
+Landroid/net/nsd/INsdManager$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/nsd/INsdManager;
diff --git a/framework-t/Android.bp b/framework-t/Android.bp
new file mode 100644
index 0000000..79bb128
--- /dev/null
+++ b/framework-t/Android.bp
@@ -0,0 +1,60 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_sdk_library {
+    name: "framework-connectivity-tiramisu",
+    sdk_version: "module_current",
+    min_sdk_version: "Tiramisu",
+    defaults: ["framework-module-defaults"],
+    srcs: [
+        ":framework-connectivity-tiramisu-updatable-sources",
+    ],
+    libs: [
+        "unsupportedappusage",
+        "app-compat-annotations",
+    ],
+    permitted_packages: [
+        "android.net",
+        "android.net.nsd",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+    impl_library_visibility: [
+        "//packages/modules/Connectivity/Tethering/apex",
+        // In preparation for future move
+        "//packages/modules/Connectivity/apex",
+        "//packages/modules/Connectivity/service-t",
+        "//frameworks/base",
+
+        // Tests using hidden APIs
+        "//cts/tests/netlegacy22.api",
+        "//external/sl4a:__subpackages__",
+        "//frameworks/libs/net/common/testutils",
+        "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/telephony/tests/telephonytests",
+        "//packages/modules/CaptivePortalLogin/tests",
+        "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/NetworkStack/tests:__subpackages__",
+        "//packages/modules/Wifi/service/tests/wifitests",
+    ],
+}
diff --git a/framework-t/api/current.txt b/framework-t/api/current.txt
new file mode 100644
index 0000000..0443456
--- /dev/null
+++ b/framework-t/api/current.txt
@@ -0,0 +1,60 @@
+// Signature format: 2.0
+package android.net.nsd {
+
+  public final class NsdManager {
+    method public void discoverServices(String, int, android.net.nsd.NsdManager.DiscoveryListener);
+    method public void registerService(android.net.nsd.NsdServiceInfo, int, android.net.nsd.NsdManager.RegistrationListener);
+    method public void resolveService(android.net.nsd.NsdServiceInfo, android.net.nsd.NsdManager.ResolveListener);
+    method public void stopServiceDiscovery(android.net.nsd.NsdManager.DiscoveryListener);
+    method public void unregisterService(android.net.nsd.NsdManager.RegistrationListener);
+    field public static final String ACTION_NSD_STATE_CHANGED = "android.net.nsd.STATE_CHANGED";
+    field public static final String EXTRA_NSD_STATE = "nsd_state";
+    field public static final int FAILURE_ALREADY_ACTIVE = 3; // 0x3
+    field public static final int FAILURE_INTERNAL_ERROR = 0; // 0x0
+    field public static final int FAILURE_MAX_LIMIT = 4; // 0x4
+    field public static final int NSD_STATE_DISABLED = 1; // 0x1
+    field public static final int NSD_STATE_ENABLED = 2; // 0x2
+    field public static final int PROTOCOL_DNS_SD = 1; // 0x1
+  }
+
+  public static interface NsdManager.DiscoveryListener {
+    method public void onDiscoveryStarted(String);
+    method public void onDiscoveryStopped(String);
+    method public void onServiceFound(android.net.nsd.NsdServiceInfo);
+    method public void onServiceLost(android.net.nsd.NsdServiceInfo);
+    method public void onStartDiscoveryFailed(String, int);
+    method public void onStopDiscoveryFailed(String, int);
+  }
+
+  public static interface NsdManager.RegistrationListener {
+    method public void onRegistrationFailed(android.net.nsd.NsdServiceInfo, int);
+    method public void onServiceRegistered(android.net.nsd.NsdServiceInfo);
+    method public void onServiceUnregistered(android.net.nsd.NsdServiceInfo);
+    method public void onUnregistrationFailed(android.net.nsd.NsdServiceInfo, int);
+  }
+
+  public static interface NsdManager.ResolveListener {
+    method public void onResolveFailed(android.net.nsd.NsdServiceInfo, int);
+    method public void onServiceResolved(android.net.nsd.NsdServiceInfo);
+  }
+
+  public final class NsdServiceInfo implements android.os.Parcelable {
+    ctor public NsdServiceInfo();
+    method public int describeContents();
+    method public java.util.Map<java.lang.String,byte[]> getAttributes();
+    method public java.net.InetAddress getHost();
+    method public int getPort();
+    method public String getServiceName();
+    method public String getServiceType();
+    method public void removeAttribute(String);
+    method public void setAttribute(String, String);
+    method public void setHost(java.net.InetAddress);
+    method public void setPort(int);
+    method public void setServiceName(String);
+    method public void setServiceType(String);
+    method public void writeToParcel(android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.nsd.NsdServiceInfo> CREATOR;
+  }
+
+}
+
diff --git a/framework-t/api/module-lib-current.txt b/framework-t/api/module-lib-current.txt
new file mode 100644
index 0000000..81d89c6
--- /dev/null
+++ b/framework-t/api/module-lib-current.txt
@@ -0,0 +1,9 @@
+// Signature format: 2.0
+package android.net {
+
+  public final class ConnectivityFrameworkInitializerTiramisu {
+    method public static void registerServiceWrappers();
+  }
+
+}
+
diff --git a/framework-t/api/module-lib-removed.txt b/framework-t/api/module-lib-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/module-lib-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework-t/api/removed.txt b/framework-t/api/removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework-t/api/system-current.txt b/framework-t/api/system-current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/system-current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework-t/api/system-removed.txt b/framework-t/api/system-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/system-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework/Android.bp b/framework/Android.bp
index 028701a..de505c7 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -94,6 +94,7 @@
         // In preparation for future move
         "//packages/modules/Connectivity/apex",
         "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/service-t",
         "//frameworks/base/packages/Connectivity/service",
         "//frameworks/base",
 
diff --git a/service-t/Android.bp b/service-t/Android.bp
new file mode 100644
index 0000000..48c74c6
--- /dev/null
+++ b/service-t/Android.bp
@@ -0,0 +1,56 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// This builds T+ services depending on framework-connectivity-tiramisu
+// hidden symbols separately from the S+ services, to ensure that S+
+// services cannot accidentally depend on T+ hidden symbols from
+// framework-connectivity-tiramisu.
+java_library {
+    name: "service-connectivity-tiramisu-pre-jarjar",
+    sdk_version: "system_server_current",
+    // TODO(b/210962470): Bump this to at least S, and then T.
+    min_sdk_version: "30",
+    srcs: [
+        "src/**/*.java",
+        // TODO: This is necessary just for LocalLog, remove after removing NativeDaemonConnector.
+        ":framework-connectivity-shared-srcs",
+        ":services.connectivity-tiramisu-updatable-sources",
+    ],
+    libs: [
+        "framework-annotations-lib",
+        "framework-connectivity.impl",
+        "framework-connectivity-tiramisu.impl",
+        "service-connectivity-pre-jarjar",
+        "unsupportedappusage",
+    ],
+    static_libs: [
+        "modules-utils-build",
+        "modules-utils-statemachine",
+        "net-utils-framework-common",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+    visibility: [
+        "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+    ],
+}
diff --git a/service/src/com/android/server/ConnectivityServiceInitializer.java b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
similarity index 68%
rename from service/src/com/android/server/ConnectivityServiceInitializer.java
rename to service-t/src/com/android/server/ConnectivityServiceInitializer.java
index b1a56ae..23d8bdc 100644
--- a/service/src/com/android/server/ConnectivityServiceInitializer.java
+++ b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
@@ -19,6 +19,8 @@
 import android.content.Context;
 import android.util.Log;
 
+import com.android.modules.utils.build.SdkLevel;
+
 /**
  * Connectivity service initializer for core networking. This is called by system server to create
  * a new instance of ConnectivityService.
@@ -26,12 +28,14 @@
 public final class ConnectivityServiceInitializer extends SystemService {
     private static final String TAG = ConnectivityServiceInitializer.class.getSimpleName();
     private final ConnectivityService mConnectivity;
+    private final NsdService mNsdService;
 
     public ConnectivityServiceInitializer(Context context) {
         super(context);
         // Load JNI libraries used by ConnectivityService and its dependencies
         System.loadLibrary("service-connectivity");
         mConnectivity = new ConnectivityService(context);
+        mNsdService = createNsdService(context);
     }
 
     @Override
@@ -39,5 +43,20 @@
         Log.i(TAG, "Registering " + Context.CONNECTIVITY_SERVICE);
         publishBinderService(Context.CONNECTIVITY_SERVICE, mConnectivity,
                 /* allowIsolated= */ false);
+        if (mNsdService != null) {
+            Log.i(TAG, "Registering " + Context.NSD_SERVICE);
+            publishBinderService(Context.NSD_SERVICE, mNsdService, /* allowIsolated= */ false);
+        }
+    }
+
+    /** Return NsdService instance or null if current SDK is lower than T */
+    private NsdService createNsdService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+        try {
+            return NsdService.create(context);
+        } catch (InterruptedException e) {
+            Log.d(TAG, "Unable to get NSD service", e);
+            return null;
+        }
     }
 }
diff --git a/service/Android.bp b/service/Android.bp
index 1ec7daa..76f9153 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -108,6 +108,10 @@
         "com.android.tethering",
     ],
     lint: { strict_updatability_linting: true },
+    visibility: [
+        "//packages/modules/Connectivity/service-t",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+    ],
 }
 
 java_library {
@@ -132,8 +136,13 @@
     sdk_version: "system_server_current",
     min_sdk_version: "30",
     installable: true,
+    // This library combines system server jars that have access to different bootclasspath jars.
+    // Lower SDK service jars must not depend on higher SDK jars as that would let them
+    // transitively depend on the wrong bootclasspath jars. Sources also cannot be added here as
+    // they would transitively depend on bootclasspath jars that may not be available.
     static_libs: [
         "service-connectivity-pre-jarjar",
+        "service-connectivity-tiramisu-pre-jarjar",
     ],
     jarjar_rules: "jarjar-rules.txt",
     apex_available: [
diff --git a/tests/common/Android.bp b/tests/common/Android.bp
index c533dab..f1897f5 100644
--- a/tests/common/Android.bp
+++ b/tests/common/Android.bp
@@ -114,6 +114,7 @@
         // meaning @hide APIs in framework-connectivity are resolved before @SystemApi
         // stubs in framework
         "framework-connectivity.impl",
+        "framework-connectivity-tiramisu.impl",
         "framework-tethering.impl",
         "framework",
 
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
index 1b52ec4..5309e02 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
@@ -53,6 +53,7 @@
 import android.os.BatteryManager;
 import android.os.Binder;
 import android.os.Bundle;
+import android.os.RemoteCallback;
 import android.os.SystemClock;
 import android.provider.DeviceConfig;
 import android.service.notification.NotificationListenerService;
@@ -140,6 +141,7 @@
 
     private static final int ACTIVITY_NETWORK_STATE_TIMEOUT_MS = 6_000;
     private static final int JOB_NETWORK_STATE_TIMEOUT_MS = 10_000;
+    private static final int LAUNCH_ACTIVITY_TIMEOUT_MS = 10_000;
 
     // Must be higher than NETWORK_TIMEOUT_MS
     private static final int ORDERED_BROADCAST_TIMEOUT_MS = NETWORK_TIMEOUT_MS * 4;
@@ -798,6 +800,22 @@
         mDeviceIdleDeviceConfigStateHelper.restoreOriginalValues();
     }
 
+    protected void launchActivity() throws Exception {
+        turnScreenOn();
+        final CountDownLatch latch = new CountDownLatch(1);
+        final Intent launchIntent = getIntentForComponent(TYPE_COMPONENT_ACTIVTIY);
+        final RemoteCallback callback = new RemoteCallback(result -> latch.countDown());
+        launchIntent.putExtra(Intent.EXTRA_REMOTE_CALLBACK, callback);
+        mContext.startActivity(launchIntent);
+        // There might be a race when app2 is launched but ACTION_FINISH_ACTIVITY has not registered
+        // before test calls finishActivity(). When the issue is happened, there is no way to fix
+        // it, so have a callback design to make sure that the app is launched completely and
+        // ACTION_FINISH_ACTIVITY will be registered before leaving this method.
+        if (!latch.await(LAUNCH_ACTIVITY_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+            fail("Timed out waiting for launching activity");
+        }
+    }
+
     protected void launchComponentAndAssertNetworkAccess(int type) throws Exception {
         launchComponentAndAssertNetworkAccess(type, true);
     }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
index ad7ec9e..a0d88c9 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
@@ -18,37 +18,28 @@
 
 import static android.os.Process.SYSTEM_UID;
 
+import static com.android.cts.net.hostside.NetworkPolicyTestUtils.assertIsUidRestrictedOnMeteredNetworks;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.assertNetworkingBlockedStatusForUid;
-import static com.android.cts.net.hostside.NetworkPolicyTestUtils.canChangeActiveNetworkMeteredness;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.isUidNetworkingBlocked;
-import static com.android.cts.net.hostside.NetworkPolicyTestUtils.isUidRestrictedOnMeteredNetworks;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.setRestrictBackground;
 import static com.android.cts.net.hostside.Property.BATTERY_SAVER_MODE;
 import static com.android.cts.net.hostside.Property.DATA_SAVER_MODE;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assume.assumeTrue;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Rule;
 import org.junit.Test;
 
 public class NetworkPolicyManagerTest extends AbstractRestrictBackgroundNetworkTestCase {
     private static final boolean METERED = true;
     private static final boolean NON_METERED = false;
 
-    @Rule
-    public final MeterednessConfigurationRule mMeterednessConfiguration =
-            new MeterednessConfigurationRule();
-
     @Before
     public void setUp() throws Exception {
         super.setUp();
 
-        assumeTrue(canChangeActiveNetworkMeteredness());
-
         registerBroadcastReceiver();
 
         removeRestrictBackgroundWhitelist(mUid);
@@ -145,13 +136,14 @@
             removeRestrictBackgroundWhitelist(mUid);
 
             // Make TEST_APP2_PKG go to foreground and mUid will be allowed temporarily.
-            launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
+            launchActivity();
             assertForegroundState();
             assertNetworkingBlockedStatusForUid(mUid, METERED,
                     false /* expectedResult */); // Match NTWK_ALLOWED_TMP_ALLOWLIST
 
             // Back to background.
             finishActivity();
+            assertBackgroundState();
             assertNetworkingBlockedStatusForUid(mUid, METERED,
                     true /* expectedResult */); // Match NTWK_BLOCKED_BG_RESTRICT
         } finally {
@@ -222,26 +214,27 @@
             // enabled and mUid is not in the restrict background whitelist and TEST_APP2_PKG is not
             // in the foreground. For other cases, it will return false.
             setRestrictBackground(true);
-            assertTrue(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, true /* expectedResult */);
 
             // Make TEST_APP2_PKG go to foreground and isUidRestrictedOnMeteredNetworks() will
             // return false.
-            launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
+            launchActivity();
             assertForegroundState();
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
             // Back to background.
             finishActivity();
+            assertBackgroundState();
 
             // Add mUid into restrict background whitelist and isUidRestrictedOnMeteredNetworks()
             // will return false.
             addRestrictBackgroundWhitelist(mUid);
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
             removeRestrictBackgroundWhitelist(mUid);
         } finally {
             // Restrict background is disabled and isUidRestrictedOnMeteredNetworks() will return
             // false.
             setRestrictBackground(false);
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
         }
     }
 }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
index 89a9bd6..9c4a348 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
@@ -439,6 +439,11 @@
         PollingCheck.waitFor(() -> (expectedResult == isUidNetworkingBlocked(uid, metered)));
     }
 
+    public static void assertIsUidRestrictedOnMeteredNetworks(int uid, boolean expectedResult)
+            throws Exception {
+        PollingCheck.waitFor(() -> (expectedResult == isUidRestrictedOnMeteredNetworks(uid)));
+    }
+
     public static boolean isUidNetworkingBlocked(int uid, boolean meteredNetwork) {
         final UiAutomation uiAutomation = getInstrumentation().getUiAutomation();
         try {
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
index 5f0f6d6..4266aad 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
@@ -24,6 +24,7 @@
     @Before
     public void setUp() throws Exception {
         super.setUp();
+        setRestrictedNetworkingMode(false);
     }
 
     @After
@@ -34,8 +35,6 @@
 
     @Test
     public void testNetworkAccess() throws Exception {
-        setRestrictedNetworkingMode(false);
-
         // go to foreground state and enable restricted mode
         launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
         setRestrictedNetworkingMode(true);
@@ -54,4 +53,18 @@
         finishActivity();
         assertBackgroundNetworkAccess(true);
     }
+
+    @Test
+    public void testNetworkAccess_withBatterySaver() throws Exception {
+        setBatterySaverMode(true);
+        addPowerSaveModeWhitelist(TEST_APP2_PKG);
+        assertBackgroundNetworkAccess(true);
+
+        setRestrictedNetworkingMode(true);
+        // App would be denied network access since Restricted mode is on.
+        assertBackgroundNetworkAccess(false);
+        setRestrictedNetworkingMode(false);
+        // Given that Restricted mode is turned off, app should be able to access network again.
+        assertBackgroundNetworkAccess(true);
+    }
 }
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
index 9fdb9c9..54eb927 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
@@ -17,7 +17,6 @@
 
 import static com.android.cts.net.hostside.app2.Common.ACTION_FINISH_ACTIVITY;
 import static com.android.cts.net.hostside.app2.Common.TAG;
-import static com.android.cts.net.hostside.app2.Common.TEST_PKG;
 import static com.android.cts.net.hostside.app2.Common.TYPE_COMPONENT_ACTIVTY;
 
 import android.app.Activity;
@@ -25,13 +24,10 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.os.AsyncTask;
 import android.os.Bundle;
-import android.os.RemoteException;
+import android.os.RemoteCallback;
 import android.util.Log;
 
-import com.android.cts.net.hostside.INetworkStateObserver;
-
 /**
  * Activity used to bring process to foreground.
  */
@@ -52,6 +48,11 @@
             }
         };
         registerReceiver(finishCommandReceiver, new IntentFilter(ACTION_FINISH_ACTIVITY));
+        final RemoteCallback callback = getIntent().getParcelableExtra(
+                Intent.EXTRA_REMOTE_CALLBACK);
+        if (callback != null) {
+            callback.sendResult(null);
+        }
     }
 
     @Override
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java b/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
index a95fc64..f633df4 100644
--- a/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
@@ -330,6 +330,11 @@
                 "testNetworkAccess");
     }
 
+    public void testNetworkAccess_restrictedMode_withBatterySaver() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".RestrictedModeTest",
+                "testNetworkAccess_withBatterySaver");
+    }
+
     /************************
      * Expedited job tests. *
      ************************/
diff --git a/tests/deflake/Android.bp b/tests/deflake/Android.bp
index b3d0363..8205f1c 100644
--- a/tests/deflake/Android.bp
+++ b/tests/deflake/Android.bp
@@ -21,7 +21,7 @@
 
 // FrameworksNetDeflakeTest depends on FrameworksNetTests so it should be disabled
 // if FrameworksNetTests is disabled.
-enable_frameworks_net_deflake_test = false
+enable_frameworks_net_deflake_test = true
 // Placeholder
 // This is a placeholder comment to minimize merge conflicts, as enable_frameworks_net_deflake_test
 // may have different values depending on the branch
diff --git a/tests/unit/Android.bp b/tests/unit/Android.bp
index 9e80a25..48751f4 100644
--- a/tests/unit/Android.bp
+++ b/tests/unit/Android.bp
@@ -13,7 +13,7 @@
 // Whether to enable the FrameworksNetTests. Set to false in the branches that might have older
 // frameworks/base since FrameworksNetTests includes the test for classes that are not in
 // connectivity module.
-enable_frameworks_net_tests = false
+enable_frameworks_net_tests = true
 // Placeholder
 // This is a placeholder comment to minimize merge conflicts, as enable_frameworks_net_tests
 // may have different values depending on the branch
@@ -130,6 +130,7 @@
         "platform-compat-test-rules",
         "platform-test-annotations",
         "service-connectivity-pre-jarjar",
+        "service-connectivity-tiramisu-pre-jarjar",
         "services.core-vpn",
     ],
     libs: [