[automerger skipped] DO NOT MERGE Add mutex for std::map in btif_av.cc am:...

[automerger skipped] DO NOT MERGE Add mutex for std::map in btif_av.cc am: 4e1a76ea am: c5be9563 -s ours am: 898ce195 -s ours

am skip reason: subject contains skip directive

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I0cddfc4485a7b2d26986dd8e4d5bf91875148a1a