类型转换异常

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## Current use version？
#### 当前使用的版本是多少？

```
v3.10.7
```

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

```
不能，线上小概率事件
```

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

```
java.lang.RuntimeException:Unable to destroy activity {com.xxx/com.luck.picture.lib.basic.PictureSelectorTransparentActivity}: java.lang.ClassCastException: com.xxx.widgets.IjkPlayerView cannot be cast to com.luck.picture.lib.widget.MediaPlayerView
android.app.ActivityThread.performDestroyActivity(ActivityThread.java:6093)
......
Caused by:
java.lang.ClassCastException:com.xxx.widgets.IjkPlayerView cannot be cast to com.luck.picture.lib.widget.MediaPlayerView
com.luck.picture.lib.engine.MediaPlayerEngine.destroy(MediaPlayerEngine.java:19)
com.luck.picture.lib.adapter.holder.PreviewVideoHolder.releaseVideo(PreviewVideoHolder.java:286)
com.luck.picture.lib.adapter.PicturePreviewAdapter.destroy(PicturePreviewAdapter.java:170)
com.luck.picture.lib.PictureSelectorPreviewFragment.onDestroy(PictureSelectorPreviewFragment.java:1669)
androidx.fragment.app.Fragment.performDestroy(Fragment.java:3356)
androidx.fragment.app.FragmentStateManager.destroy(FragmentStateManager.java:781)
```

Start with the stack-trace path in MediaPlayerEngine.java, then inspect releaseVideo in PreviewVideoHolder.java and destroy in PicturePreviewAdapter.java. Determine why IjkPlayerView is being treated as MediaPlayerView during activity destruction, and verify the fix against the reported lifecycle failure; the payload provides no reproducible test or named test file.

Written by the indexing model from the issue text.