update to exoplayer minsdk19 am: 0fbe9bb3aa

Original change: https://android-review.googlesource.com/c/platform/external/exoplayer/+/2852985

Change-Id: I358df2e55e58e6c5a8b40b9f909bb6de10d85c12
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>