Add //% QUAD_SURFACE_ON_CREATE_INPUT_CONNECTION to java/MainActivity.

I need to modify onCreateInputConnection() to return my own InputConnection so I can catch user typing suggestions. Putting this here allows me to return early with my own custom input connection.

java/MainActivity.java

@@ -180,6 +180,8 @@ public boolean onKey(View v, int keyCode, KeyEvent event) {
     // For some reason it only works if placed here and not in the parent layout.
     @Override
     public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
+        //% QUAD_SURFACE_ON_CREATE_INPUT_CONNECTION
+
         InputConnection connection = super.onCreateInputConnection(outAttrs);
         outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_FULLSCREEN;
         return connection;