[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/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();
 }