private void showEmptyData() {
        mEmptyTxt.setVisibility(View.VISIBLE);
        mRecycleView.setVisibility(View.GONE);
        mLoadingView.setVisibility(View.GONE);
    }
the most easy to implement {@link PickerContract.View} to show medias with google's Bottom Sheet </br>
for simplest purpose, it only support SINGLE_IMG and VIDEO Mode.
for MULTI_IMG mode, use {@link BoxingViewFragment} instead.

@author ChenSL
boxing-impl/src/main/java/com/bilibili/boxing_impl/ui/BoxingBottomSheetFragment.java