Merge "AudioPolicyService: Acquire mutex for SoundTriggerSession" into lmp-dev am: 35a587cdc5 am: 27c4e661d4  -s ours am: ac43fbe5a6  -s ours am: f513923b38  -s ours am: a421c87781  -s ours am: 310807ff52  -s ours am: 25c38b2f40  -s ours am: 550c14e0a4  -s ours am: 99555160ee  -s ours am: a0fd1b9e00  -s ours am: d206dd91b0  -s ours am: b040d5f2e3  -s ours am: 4c1c9c8f5d  -s ours
am: b845e3a3cb  -s ours

Change-Id: Idf4b0a29a80e34feb8534f2ab0a8aedc684876b9