
The `MediaItem` instances in the following cases are not actually empty but acts as a placeholder. `EMPTY_MEDIA_ITEM` can also be confused with `MediaItem.EMPTY`. PiperOrigin-RevId: 495843012 (cherry picked from commit 74559b4a188e476378f3f0df908598ce763d909a)
ExoPlayer library
The ExoPlayer library is split into multiple modules. See ExoPlayer's top level README for more information about the available library modules and how to use them.