Merge changes I6a48d4db,I6741c41c,Ifec6bde5,Icd0717c5

* changes:
  Remove unused variables
  Return offloaded traffic when querying from TrafficStats API
  Add hardware tethering traffic in testTethering test
  Remove unused getTetherStats
diff --git a/core/java/android/app/usage/NetworkStatsManager.java b/core/java/android/app/usage/NetworkStatsManager.java
index fc8248e..1ddfe0d 100644
--- a/core/java/android/app/usage/NetworkStatsManager.java
+++ b/core/java/android/app/usage/NetworkStatsManager.java
@@ -34,6 +34,7 @@
 import android.net.netstats.provider.INetworkStatsProviderCallback;
 import android.net.netstats.provider.NetworkStatsProvider;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
@@ -129,7 +130,7 @@
     /**
      * {@hide}
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public NetworkStatsManager(Context context) throws ServiceNotFoundException {
         this(context, INetworkStatsService.Stub.asInterface(
                 ServiceManager.getServiceOrThrow(Context.NETWORK_STATS_SERVICE)));
@@ -153,7 +154,7 @@
     }
 
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @TestApi
     public void setPollForce(boolean pollForce) {
         if (pollForce) {
diff --git a/core/java/android/net/EthernetManager.java b/core/java/android/net/EthernetManager.java
index 5860e20..84a8e1c 100644
--- a/core/java/android/net/EthernetManager.java
+++ b/core/java/android/net/EthernetManager.java
@@ -23,6 +23,7 @@
 import android.annotation.TestApi;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
+import android.os.Build;
 import android.os.Handler;
 import android.os.Message;
 import android.os.RemoteException;
@@ -76,7 +77,7 @@
          * @param isAvailable {@code true} if Ethernet port exists.
          * @hide
          */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         void onAvailabilityChanged(String iface, boolean isAvailable);
     }
 
@@ -97,7 +98,7 @@
      * @return the Ethernet Configuration, contained in {@link IpConfiguration}.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public IpConfiguration getConfiguration(String iface) {
         try {
             return mService.getConfiguration(iface);
@@ -110,7 +111,7 @@
      * Set Ethernet configuration.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public void setConfiguration(String iface, IpConfiguration config) {
         try {
             mService.setConfiguration(iface, config);
@@ -123,7 +124,7 @@
      * Indicates whether the system currently has one or more Ethernet interfaces.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public boolean isAvailable() {
         return getAvailableInterfaces().length > 0;
     }
@@ -134,7 +135,7 @@
      * @param iface Ethernet interface name
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public boolean isAvailable(String iface) {
         try {
             return mService.isAvailable(iface);
@@ -149,7 +150,7 @@
      * @throws IllegalArgumentException If the listener is null.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public void addListener(Listener listener) {
         if (listener == null) {
             throw new IllegalArgumentException("listener must not be null");
@@ -168,7 +169,7 @@
      * Returns an array of available Ethernet interface names.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public String[] getAvailableInterfaces() {
         try {
             return mService.getAvailableInterfaces();
@@ -183,7 +184,7 @@
      * @throws IllegalArgumentException If the listener is null.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public void removeListener(Listener listener) {
         if (listener == null) {
             throw new IllegalArgumentException("listener must not be null");
diff --git a/core/java/android/net/INetworkStatsService.aidl b/core/java/android/net/INetworkStatsService.aidl
index 5fa515a..1a3dc97 100644
--- a/core/java/android/net/INetworkStatsService.aidl
+++ b/core/java/android/net/INetworkStatsService.aidl
@@ -42,7 +42,7 @@
      *  PACKAGE_USAGE_STATS permission is always checked. If PACKAGE_USAGE_STATS is not granted
      *  READ_NETWORK_USAGE_STATS is checked for.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     INetworkStatsSession openSessionForUsageStats(int flags, String callingPackage);
 
     /** Return data layer snapshot of UID network usage. */
diff --git a/core/java/android/net/NetworkStats.java b/core/java/android/net/NetworkStats.java
index 34e48eb..cf40ce5 100644
--- a/core/java/android/net/NetworkStats.java
+++ b/core/java/android/net/NetworkStats.java
@@ -21,6 +21,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.SystemClock;
@@ -219,11 +220,11 @@
      * generated.
      */
     private long elapsedRealtime;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private int size;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private int capacity;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private String[] iface;
     @UnsupportedAppUsage
     private int[] uid;
@@ -231,21 +232,21 @@
     private int[] set;
     @UnsupportedAppUsage
     private int[] tag;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private int[] metered;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private int[] roaming;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private int[] defaultNetwork;
     @UnsupportedAppUsage
     private long[] rxBytes;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private long[] rxPackets;
     @UnsupportedAppUsage
     private long[] txBytes;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private long[] txPackets;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private long[] operations;
 
     /**
@@ -258,7 +259,7 @@
     @SystemApi
     public static class Entry {
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public String iface;
         /** @hide */
         @UnsupportedAppUsage
@@ -267,7 +268,7 @@
         @UnsupportedAppUsage
         public int set;
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public int tag;
         /**
          * Note that this is only populated w/ the default value when read from /proc or written
@@ -294,20 +295,20 @@
         @UnsupportedAppUsage
         public long rxBytes;
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long rxPackets;
         /** @hide */
         @UnsupportedAppUsage
         public long txBytes;
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long txPackets;
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long operations;
 
         /** @hide */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public Entry() {
             this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L);
         }
@@ -454,7 +455,7 @@
     }
 
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public NetworkStats(Parcel parcel) {
         elapsedRealtime = parcel.readLong();
         size = parcel.readInt();
diff --git a/core/java/android/net/NetworkStatsHistory.java b/core/java/android/net/NetworkStatsHistory.java
index 51f09a0..fba7561 100644
--- a/core/java/android/net/NetworkStatsHistory.java
+++ b/core/java/android/net/NetworkStatsHistory.java
@@ -32,6 +32,7 @@
 import static com.android.internal.util.ArrayUtils.total;
 
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.service.NetworkStatsHistoryBucketProto;
@@ -91,18 +92,18 @@
     public static class Entry {
         public static final long UNKNOWN = -1;
 
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long bucketDuration;
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long bucketStart;
         public long activeTime;
         @UnsupportedAppUsage
         public long rxBytes;
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long rxPackets;
         @UnsupportedAppUsage
         public long txBytes;
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public long txPackets;
         public long operations;
     }
@@ -134,7 +135,7 @@
         recordEntireHistory(existing);
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public NetworkStatsHistory(Parcel in) {
         bucketDuration = in.readLong();
         bucketStart = readLongArray(in);
@@ -220,7 +221,7 @@
         return 0;
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public int size() {
         return bucketCount;
     }
@@ -258,7 +259,7 @@
      * Return index of bucket that contains or is immediately before the
      * requested time.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public int getIndexBefore(long time) {
         int index = Arrays.binarySearch(bucketStart, 0, bucketCount, time);
         if (index < 0) {
@@ -286,7 +287,7 @@
     /**
      * Return specific stats entry.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public Entry getValues(int i, Entry recycle) {
         final Entry entry = recycle != null ? recycle : new Entry();
         entry.bucketStart = bucketStart[i];
diff --git a/core/java/android/net/NetworkTemplate.java b/core/java/android/net/NetworkTemplate.java
index cd26079..72be835 100644
--- a/core/java/android/net/NetworkTemplate.java
+++ b/core/java/android/net/NetworkTemplate.java
@@ -37,6 +37,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.telephony.Annotation.NetworkType;
@@ -159,7 +160,7 @@
      * Template to match metered {@link ConnectivityManager#TYPE_MOBILE} networks,
      * regardless of IMSI.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static NetworkTemplate buildTemplateMobileWildcard() {
         return new NetworkTemplate(MATCH_MOBILE_WILDCARD, null, null);
     }
diff --git a/core/java/android/net/TrafficStats.java b/core/java/android/net/TrafficStats.java
index 7a79ceb..7376830 100644
--- a/core/java/android/net/TrafficStats.java
+++ b/core/java/android/net/TrafficStats.java
@@ -565,7 +565,7 @@
     }
 
     /** {@hide} */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static long getMobileTcpRxPackets() {
         long total = 0;
         for (String iface : getMobileIfaces()) {
@@ -581,7 +581,7 @@
     }
 
     /** {@hide} */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static long getMobileTcpTxPackets() {
         long total = 0;
         for (String iface : getMobileIfaces()) {
diff --git a/core/java/android/net/nsd/INsdManager.aidl b/core/java/android/net/nsd/INsdManager.aidl
index 9484c74..e9e8935 100644
--- a/core/java/android/net/nsd/INsdManager.aidl
+++ b/core/java/android/net/nsd/INsdManager.aidl
@@ -25,7 +25,7 @@
  */
 interface INsdManager
 {
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     Messenger getMessenger();
     void setEnabled(boolean enable);
 }