Remove callback upon MediaSession#release am: 3cfa79c53c am: b68a7b7822 am: 017d558661

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

Change-Id: I01295207bb56d33506980533d30725103c259336
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>