update to use job intent service

Author: vimanyu

messaging/testapp/AndroidManifest.xml

@@ -52,6 +52,7 @@
              android:exported="false" >
     </service>
     <service android:name="com.google.firebase.messaging.MessageForwardingService"
+             android:permission="android.permission.BIND_JOB_SERVICE"
              android:exported="false" >
     </service>
 

messaging/testapp/src/android/java/com/google/firebase/example/TestappNativeActivity.java

@@ -54,7 +54,7 @@ protected void onNewIntent(Intent intent) {
       message.setAction(MessageForwardingService.ACTION_REMOTE_INTENT);
       message.putExtras(intent);
       message.setData(intent.getData());
-      startService(message);
+      MessageForwardingService.enqueueWork(this, message);
     }
     setIntent(intent);
   }