Fix Deadlock

• Fixes an issue that caused getTags requests to occasionally enter into a deadlock

Author: Nightsd01

OneSignalSDK/onesignal/src/main/java/com/onesignal/UserStatePushSynchronizer.java

@@ -52,7 +52,7 @@ void onSuccess(String responseStr) {
         }
 
         synchronized(syncLock) {
-            return new GetTagsResult(serverSuccess, JSONUtils.getJSONObjectWithoutBlankValues(getToSyncUserState().syncValues, "tags"));
+            return new GetTagsResult(serverSuccess, JSONUtils.getJSONObjectWithoutBlankValues(toSyncUserState.syncValues, "tags"));
         }
     }