选择图片没问题，选择视频时视频没有封面图、选中视频不回调

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## Current use version？
#### 当前使用的版本是多少？
implementation 'io.github.lucksiege:pictureselector:v3.11.2'
```

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## Will this problem occur in demo?
#### Demo能否复现这问题？

```

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## Describe the problem or provide an error log？
#### 描述问题或提供错误log？

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```
华为mate20
private void slelectVideo() {
PictureSelector.create(getContext())
.openGallery(SelectMimeType.ofVideo())//全部.PictureMimeType.ofAll()、图片.ofImage()、视频.ofVideo()、音频.ofAudio()
.setMaxSelectNum(1)// 最大图片选择数量 int
.setImageSpanCount(3)// 每行显示个数 int
.setImageEngine(GlideEngine.createGlideEngine())
.setSelectionMode(SelectModeConfig.SINGLE)// 多选 or 单选 PictureConfig.MULTIPLE or PictureConfig.SINGLE
.forResult(new OnResultCallbackListener() {
@Override
public void onResult(ArrayList addMedialList) {
String path = addMedialList.get(0).getRealPath();
}

@Override
public void onCancel() {

}
});
}

Reproduce the shown selectVideo flow with PictureSelector v3.11.2 on a Huawei Mate20, comparing video selection with image selection. Investigate why video thumbnails lack cover images and why OnResultCallbackListener is not called; done when a selected video displays a cover and returns its LocalMedia result.

Written by the indexing model from the issue text.