[automerger skipped] Merge "aaudio: use weak pointer to prevent UAF" into oc-mr1-dev am: 723e8fc248  -s ours am: 1ab07d1de9  -s ours
am: 2dcfc31372  -s ours

Change-Id: I4f18c319c9dd7f7f9f17f15218afd96882862a0b