audio HAL - fix UAFs am: 7283cbe8cb am: e227bfd15c am: facfee6382 am: da947d5127

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/14212414

Change-Id: I7c4ba7e1ed4e7c71e10332ce986bbc7b6aba8f40