[DK3] Send onPause/onResume keepalive callbacks

Test: CTS in the patch immediately on top of this, [DK4]
Change-Id: I208ceceb37c7977452479361f70f046fabafb37a
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 17389b4..497c105 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -2213,9 +2213,13 @@
         /** The requested keepalive was successfully started. */
         @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onStarted() {}
+        /** The keepalive was resumed after being paused by the system. */
+        public void onResumed() {}
         /** The keepalive was successfully stopped. */
         @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onStopped() {}
+        /** The keepalive was paused automatically by the system. */
+        public void onPaused() {}
         /** An error occurred. */
         @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onError(int error) {}
@@ -2314,6 +2318,18 @@
                 }
 
                 @Override
+                public void onResumed() {
+                    final long token = Binder.clearCallingIdentity();
+                    try {
+                        mExecutor.execute(() -> {
+                            callback.onResumed();
+                        });
+                    } finally {
+                        Binder.restoreCallingIdentity(token);
+                    }
+                }
+
+                @Override
                 public void onStopped() {
                     final long token = Binder.clearCallingIdentity();
                     try {
@@ -2327,6 +2343,19 @@
                 }
 
                 @Override
+                public void onPaused() {
+                    final long token = Binder.clearCallingIdentity();
+                    try {
+                        mExecutor.execute(() -> {
+                            callback.onPaused();
+                        });
+                    } finally {
+                        Binder.restoreCallingIdentity(token);
+                    }
+                    mExecutor.shutdown();
+                }
+
+                @Override
                 public void onError(int error) {
                     final long token = Binder.clearCallingIdentity();
                     try {
diff --git a/framework/src/android/net/ISocketKeepaliveCallback.aidl b/framework/src/android/net/ISocketKeepaliveCallback.aidl
index 1240e37..0a1de6c 100644
--- a/framework/src/android/net/ISocketKeepaliveCallback.aidl
+++ b/framework/src/android/net/ISocketKeepaliveCallback.aidl
@@ -31,4 +31,8 @@
     void onError(int error);
     /** The keepalive on a TCP socket was stopped because the socket received data. */
     void onDataReceived();
+    /** The keepalive was paused by the system because it's not necessary right now. */
+    void onPaused();
+    /** The keepalive was resumed by the system after being suspended. */
+    void onResumed();
 }
diff --git a/framework/src/android/net/SocketKeepalive.java b/framework/src/android/net/SocketKeepalive.java
index 2911ce7..00104f6 100644
--- a/framework/src/android/net/SocketKeepalive.java
+++ b/framework/src/android/net/SocketKeepalive.java
@@ -64,6 +64,12 @@
     public static final int SUCCESS = 0;
 
     /**
+     * Success when trying to suspend.
+     * @hide
+     */
+    public static final int SUCCESS_PAUSED = 1;
+
+    /**
      * No keepalive. This should only be internally as it indicates There is no keepalive.
      * It should not propagate to applications.
      * @hide
@@ -271,6 +277,18 @@
             }
 
             @Override
+            public void onResumed() {
+                final long token = Binder.clearCallingIdentity();
+                try {
+                    mExecutor.execute(() -> {
+                        callback.onResumed();
+                    });
+                } finally {
+                    Binder.restoreCallingIdentity(token);
+                }
+            }
+
+            @Override
             public void onStopped() {
                 final long token = Binder.clearCallingIdentity();
                 try {
@@ -283,6 +301,18 @@
             }
 
             @Override
+            public void onPaused() {
+                final long token = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> {
+                        callback.onPaused();
+                    });
+                } finally {
+                    Binder.restoreCallingIdentity(token);
+                }
+            }
+
+            @Override
             public void onError(int error) {
                 final long token = Binder.clearCallingIdentity();
                 try {
@@ -387,8 +417,18 @@
     public static class Callback {
         /** The requested keepalive was successfully started. */
         public void onStarted() {}
+        /**
+         * The keepalive was resumed by the system after being suspended.
+         * @hide
+         **/
+        public void onResumed() {}
         /** The keepalive was successfully stopped. */
         public void onStopped() {}
+        /**
+         * The keepalive was paused by the system because it's not necessary right now.
+         * @hide
+         **/
+        public void onPaused() {}
         /** An error occurred. */
         public void onError(@ErrorCode int error) {}
         /** The keepalive on a TCP socket was stopped because the socket received data. This is