Restore compatibility with RN v0.46 (#980)

* Revert "Remove overriden createJSModules"

This reverts commit dff9f47.

* Remove @OverRide annotation to support RN v0.47

Author: cooperka

android/app/src/main/java/com/microsoft/codepush/react/CodePush.java

@@ -304,6 +304,11 @@ public List<NativeModule> createNativeModules(ReactApplicationContext reactAppli
         return nativeModules;
     }
 
+    // Deprecated in RN v0.47.
+    public List<Class<? extends JavaScriptModule>> createJSModules() {
+        return new ArrayList<>();
+    }
+
     @Override
     public List<ViewManager> createViewManagers(ReactApplicationContext reactApplicationContext) {
         return new ArrayList<>();