Fix shouldUpdateBadgesWhenDismissingNotification

* This test was flaky as it wasn't waiting for the service to display
the notification.

Author: jkasten2

OneSignalSDK/unittest/src/test/java/com/test/onesignal/GenerateNotificationRunner.java

@@ -719,9 +719,10 @@ private void runImplicitServices() throws Exception {
 
    @Test
    @Config(shadows = { ShadowGenerateNotification.class })
-   public void shouldUpdateBadgesWhenDismissingNotification() {
+   public void shouldUpdateBadgesWhenDismissingNotification() throws Exception {
       Bundle bundle = getBaseNotifBundle();
       NotificationBundleProcessor_ProcessFromFCMIntentService(blankActivity, bundle);
+      threadAndTaskWait();
       assertEquals(notifMessage, ShadowRoboNotificationManager.getLastShadowNotif().getContentText());
       assertEquals(1, ShadowBadgeCountUpdater.lastCount);