Merge "AudioPolicyService: Acquire mutex for SoundTriggerSession" into lmp-dev...

Merge "AudioPolicyService: Acquire mutex for SoundTriggerSession" into lmp-dev am: 35a587cd am: 27c4e661  -s ours am: ac43fbe5  -s ours am: f513923b  -s ours am: a421c877  -s ours am: 310807ff  -s ours am: 25c38b2f  -s ours am: 550c14e0  -s ours am: 99555160  -s ours am: a0fd1b9e  -s ours
am: d206dd91  -s ours

Change-Id: Ibab97ff08663841d14d0fd1662a9a9c71d68a887