[automerger skipped] Enable UI component in Exo Player lib am: e6fbc172e7 -s ours

am skip reason: Merged-In Ibbb8467bdab561eba257046ae5a6b24b885defd0 with SHA-1 1cd67d4882 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/exoplayer/+/16214588

Change-Id: Id0756173d2ebb13280c00a88a1bfb5650467b418