for consistency with firebase-cpp-sdk android manifest

Didn't see any difference on adding this in quickstart but it
is good for consistency sake.

Author: vimanyu

messaging/testapp/AndroidManifest.xml

@@ -49,6 +49,7 @@
     </service>
 
     <service android:name="com.google.firebase.messaging.cpp.RegistrationIntentService"
+             android:permission="android.permission.BIND_JOB_SERVICE"
              android:exported="false" >
     </service>
     <service android:name="com.google.firebase.messaging.MessageForwardingService"