Update media provider's exoplayer version am: 28105b72e1

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/exoplayer/+/17607451

Change-Id: I26f8109bbe9a6759b29a73d177d394e6676d3925
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>