Merge "DO NOT MERGE Add mutex for std::map in btif_av.cc" into rvc-dev am:...

Merge "DO NOT MERGE Add mutex for std::map in btif_av.cc" into rvc-dev am: 5ad16c01 am: baf251d0

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/bt/+/13425807

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I274e711f3fc1bd75656e10d87012053cd6dd6172