test(messaging, android): reinstate subscription to topics e2e tests (#10452)

* test(messaging, android): reinstate subscription to topics e2e tests

* analyse issue

Author: russellwheatley

tests/integration_test/firebase_messaging/firebase_messaging_e2e_test.dart

@@ -198,10 +198,7 @@ void main() {
             await messaging.subscribeToTopic(topic);
           },
           // macOS skipped because it needs keychain sharing entitlement. See: https://github.com/firebase/flutterfire/issues/9538
-          // Android skipped because it times out with a likelihood of 98%. See: https://github.com/firebase/flutterfire/issues/9651
-          skip: kIsWeb ||
-              defaultTargetPlatform == TargetPlatform.macOS ||
-              defaultTargetPlatform == TargetPlatform.android,
+          skip: kIsWeb || defaultTargetPlatform == TargetPlatform.macOS,
         );
       });
 
@@ -213,10 +210,7 @@ void main() {
             await messaging.unsubscribeFromTopic(topic);
           },
           // macOS skipped because it needs keychain sharing entitlement. See: https://github.com/firebase/flutterfire/issues/9538
-          // Android skipped because it times out with a likelihood of 98%. See: https://github.com/firebase/flutterfire/issues/9650
-          skip: kIsWeb ||
-              defaultTargetPlatform == TargetPlatform.macOS ||
-              defaultTargetPlatform == TargetPlatform.android,
+          skip: kIsWeb || defaultTargetPlatform == TargetPlatform.macOS,
         );
       });