SDK / exoplayer

This was originally added in https://github.com/androidx/media/commit/4fd7d777b669f6adacc3737a7e15b04a57f030fb, but it hasn't done anything
since https://github.com/androidx/media/commit/98ee159df161c7c8806c0b0490b642738822f6a7 (when the instanceof ExoPlayer check was removed).

PiperOrigin-RevId: 482161662
(cherry picked from commit a5b09b8c)