Use correct thread to remove starting window

            // Use the same thread to remove the window as we used to add it, as otherwise we end up

            // with things in the view hierarchy being called from different threads.

            mHandler.post(() -> {

            mService.mAnimationHandler.post(() -> {

                if (DEBUG_STARTING_WINDOW) Slog.v(TAG_WM, "Removing startingView=" + surface);

                try {

                    surface.remove();