Merge "aaudio test: test whether close joins the callback" into sc-dev am:...

Merge "aaudio test: test whether close joins the callback" into sc-dev am: e6d089f0 am: ce84687c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/13988088

Change-Id: I996812040b6938692d509786131f1965eeaef4c9