Player.MediaItemTransitionReason (ExoPlayer library)

```
@Documented
@Retention(SOURCE)
public static @interface Player.MediaItemTransitionReason
```
Reasons for media item transitions. One of Player.MEDIA_ITEM_TRANSITION_REASON_REPEAT, Player.MEDIA_ITEM_TRANSITION_REASON_AUTO, Player.MEDIA_ITEM_TRANSITION_REASON_SEEK or Player.MEDIA_ITEM_TRANSITION_REASON_PLAYLIST_CHANGED.