Move ConnectivityResources to service-connectivity

The ConnectivityResources class is only usable with QUERY_ALL_PACKAGES
permission, so it is not generally usable in framework-connectivity. It
is also backed by the ServiceConnectivityResources APK, which is
intended as resources for service-connectivity.

Move the class to service-connectivity and update callers. CTS needs a
way to determine the supported keepalive count as it used the
resources from KeepaliveUtils as @hide API, so provide a
ConnectivityManager @hide API for testing.

Bug: 279108992
Test: atest
Change-Id: I3c9a77c580b5ab87c922c32778bce15dc33b4d1d
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 381a18a..2315521 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -2535,6 +2535,26 @@
     }
 
     /**
+     * Get the supported keepalive count for each transport configured in resource overlays.
+     *
+     * @return An array of supported keepalive count for each transport type.
+     * @hide
+     */
+    @RequiresPermission(anyOf = { android.Manifest.permission.NETWORK_SETTINGS,
+            // CTS 13 used QUERY_ALL_PACKAGES to get the resource value, which was implemented
+            // as below in KeepaliveUtils. Also allow that permission so that KeepaliveUtils can
+            // use this method and avoid breaking released CTS. Apps that have this permission
+            // can query the resource themselves anyway.
+            android.Manifest.permission.QUERY_ALL_PACKAGES })
+    public int[] getSupportedKeepalives() {
+        try {
+            return mService.getSupportedKeepalives();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Ensure that a network route exists to deliver traffic to the specified
      * host via the specified network interface. An attempt to add a route that
      * already exists is ignored, but treated as successful.
diff --git a/framework/src/android/net/ConnectivityResources.java b/framework/src/android/net/ConnectivityResources.java
deleted file mode 100644
index 18f0de0..0000000
--- a/framework/src/android/net/ConnectivityResources.java
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * 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 android.net;
-
-import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
-
-import android.annotation.NonNull;
-import android.annotation.Nullable;
-import android.content.Context;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.content.res.Resources;
-import android.util.Log;
-
-import com.android.internal.annotations.VisibleForTesting;
-
-import java.util.List;
-
-/**
- * Utility to obtain the {@link com.android.server.ConnectivityService} {@link Resources}, in the
- * ServiceConnectivityResources APK.
- * @hide
- */
-public class ConnectivityResources {
-    private static final String RESOURCES_APK_INTENT =
-            "com.android.server.connectivity.intent.action.SERVICE_CONNECTIVITY_RESOURCES_APK";
-    private static final String RES_PKG_DIR = "/apex/com.android.tethering/";
-
-    @NonNull
-    private final Context mContext;
-
-    @Nullable
-    private Context mResourcesContext = null;
-
-    @Nullable
-    private static Context sTestResourcesContext = null;
-
-    public ConnectivityResources(Context context) {
-        mContext = context;
-    }
-
-    /**
-     * Convenience method to mock all resources for the duration of a test.
-     *
-     * Call with a null context to reset after the test.
-     */
-    @VisibleForTesting
-    public static void setResourcesContextForTest(@Nullable Context testContext) {
-        sTestResourcesContext = testContext;
-    }
-
-    /**
-     * Get the {@link Context} of the resources package.
-     */
-    public synchronized Context getResourcesContext() {
-        if (sTestResourcesContext != null) {
-            return sTestResourcesContext;
-        }
-
-        if (mResourcesContext != null) {
-            return mResourcesContext;
-        }
-
-        final List<ResolveInfo> pkgs = mContext.getPackageManager()
-                .queryIntentActivities(new Intent(RESOURCES_APK_INTENT), MATCH_SYSTEM_ONLY);
-        pkgs.removeIf(pkg -> !pkg.activityInfo.applicationInfo.sourceDir.startsWith(RES_PKG_DIR));
-        if (pkgs.size() > 1) {
-            Log.wtf(ConnectivityResources.class.getSimpleName(),
-                    "More than one package found: " + pkgs);
-        }
-        if (pkgs.isEmpty()) {
-            throw new IllegalStateException("No connectivity resource package found");
-        }
-
-        final Context pkgContext;
-        try {
-            pkgContext = mContext.createPackageContext(
-                    pkgs.get(0).activityInfo.applicationInfo.packageName, 0 /* flags */);
-        } catch (PackageManager.NameNotFoundException e) {
-            throw new IllegalStateException("Resolved package not found", e);
-        }
-
-        mResourcesContext = pkgContext;
-        return pkgContext;
-    }
-
-    /**
-     * Get the {@link Resources} of the ServiceConnectivityResources APK.
-     */
-    public Resources get() {
-        return getResourcesContext().getResources();
-    }
-}
diff --git a/framework/src/android/net/IConnectivityManager.aidl b/framework/src/android/net/IConnectivityManager.aidl
index 1372e9a..ebe8bca 100644
--- a/framework/src/android/net/IConnectivityManager.aidl
+++ b/framework/src/android/net/IConnectivityManager.aidl
@@ -195,6 +195,8 @@
 
     void stopKeepalive(in ISocketKeepaliveCallback cb);
 
+    int[] getSupportedKeepalives();
+
     String getCaptivePortalServerUrl();
 
     byte[] getNetworkWatchlistConfigHash();
diff --git a/framework/src/android/net/apf/ApfCapabilities.java b/framework/src/android/net/apf/ApfCapabilities.java
index 64f14a1..fae2499 100644
--- a/framework/src/android/net/apf/ApfCapabilities.java
+++ b/framework/src/android/net/apf/ApfCapabilities.java
@@ -19,9 +19,6 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.content.Context;
-import android.content.res.Resources;
-import android.net.ConnectivityResources;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -36,8 +33,6 @@
  */
 @SystemApi
 public final class ApfCapabilities implements Parcelable {
-    private static ConnectivityResources sResources;
-
     /**
      * Version of APF instruction set supported for packet filtering. 0 indicates no support for
      * packet filtering using APF programs.
@@ -67,15 +62,6 @@
         apfPacketFormat = in.readInt();
     }
 
-    @NonNull
-    private static synchronized ConnectivityResources getResources(@NonNull Context ctx) {
-        if (sResources == null)  {
-            sResources = new ConnectivityResources(ctx);
-        }
-        return sResources;
-    }
-
-
     @Override
     public int describeContents() {
         return 0;
diff --git a/framework/src/android/net/util/KeepaliveUtils.java b/framework/src/android/net/util/KeepaliveUtils.java
index 8d7a0b3..07b8c45 100644
--- a/framework/src/android/net/util/KeepaliveUtils.java
+++ b/framework/src/android/net/util/KeepaliveUtils.java
@@ -18,11 +18,8 @@
 
 import android.annotation.NonNull;
 import android.content.Context;
-import android.content.res.Resources;
-import android.net.ConnectivityResources;
+import android.net.ConnectivityManager;
 import android.net.NetworkCapabilities;
-import android.text.TextUtils;
-import android.util.AndroidRuntimeException;
 
 /**
  * Collection of utilities for socket keepalive offload.
@@ -33,64 +30,20 @@
 
     public static final String TAG = "KeepaliveUtils";
 
-    public static class KeepaliveDeviceConfigurationException extends AndroidRuntimeException {
-        public KeepaliveDeviceConfigurationException(final String msg) {
-            super(msg);
-        }
-    }
-
     /**
      * Read supported keepalive count for each transport type from overlay resource. This should be
      * used to create a local variable store of resource customization, and use it as the input for
-     * {@link getSupportedKeepalivesForNetworkCapabilities}.
+     * {@link #getSupportedKeepalivesForNetworkCapabilities}.
      *
      * @param context The context to read resource from.
      * @return An array of supported keepalive count for each transport type.
+     * @deprecated This is used by CTS 13, but can be removed after switching it to
+     * {@link ConnectivityManager#getSupportedKeepalives()}.
      */
     @NonNull
+    @Deprecated
     public static int[] getSupportedKeepalives(@NonNull Context context) {
-        String[] res = null;
-        try {
-            final ConnectivityResources connRes = new ConnectivityResources(context);
-            // TODO: use R.id.config_networkSupportedKeepaliveCount directly
-            final int id = connRes.get().getIdentifier("config_networkSupportedKeepaliveCount",
-                    "array", connRes.getResourcesContext().getPackageName());
-            res = new ConnectivityResources(context).get().getStringArray(id);
-        } catch (Resources.NotFoundException unused) {
-        }
-        if (res == null) throw new KeepaliveDeviceConfigurationException("invalid resource");
-
-        final int[] ret = new int[NetworkCapabilities.MAX_TRANSPORT + 1];
-        for (final String row : res) {
-            if (TextUtils.isEmpty(row)) {
-                throw new KeepaliveDeviceConfigurationException("Empty string");
-            }
-            final String[] arr = row.split(",");
-            if (arr.length != 2) {
-                throw new KeepaliveDeviceConfigurationException("Invalid parameter length");
-            }
-
-            int transport;
-            int supported;
-            try {
-                transport = Integer.parseInt(arr[0]);
-                supported = Integer.parseInt(arr[1]);
-            } catch (NumberFormatException e) {
-                throw new KeepaliveDeviceConfigurationException("Invalid number format");
-            }
-
-            if (!NetworkCapabilities.isValidTransport(transport)) {
-                throw new KeepaliveDeviceConfigurationException("Invalid transport " + transport);
-            }
-
-            if (supported < 0) {
-                throw new KeepaliveDeviceConfigurationException(
-                        "Invalid supported count " + supported + " for "
-                                + NetworkCapabilities.transportNameOf(transport));
-            }
-            ret[transport] = supported;
-        }
-        return ret;
+        return context.getSystemService(ConnectivityManager.class).getSupportedKeepalives();
     }
 
     /**