Merge "Store active player avoid it was deleted by other threads" into main am: 256a7c4a

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3333282



Change-Id: If6370e06ed05207cb914279a3822e15ea548006b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>