[automerger skipped] Remove callback upon MediaSession#release am: 3cfa79c5...

[automerger skipped] Remove callback upon MediaSession#release am: 3cfa79c5 am: b68a7b78 am: 017d5586 am: d73a304d -s ours am: d528c1c8 -s ours

am skip reason: Merged-In I112fa5df6aafdb2774ed65c2d08ab1eb680e6b47 with SHA-1 9452bb9f is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24464032



Change-Id: I58101c3df5634c5e59fcca160dd085a2cf0edcc2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>