Merge "Copy resume callbacks list prior to making callbacks" into ub-launcher3-qt-dev

        mHandler.removeCallbacks(mHandleDeferredResume);

        Utilities.postAsyncCallback(mHandler, mHandleDeferredResume);

        for (OnResumeCallback cb : mOnResumeCallbacks) {

            cb.onLauncherResume();

        }

        if (!mOnResumeCallbacks.isEmpty()) {

            final ArrayList<OnResumeCallback> resumeCallbacks = new ArrayList<>(mOnResumeCallbacks);

            mOnResumeCallbacks.clear();

            for (int i = resumeCallbacks.size() - 1; i >= 0; i--) {

                resumeCallbacks.get(i).onLauncherResume();

            }

            resumeCallbacks.clear();

        }

        if (mLauncherCallbacks != null) {

            mLauncherCallbacks.onResume();