Add tests to libaudioclient pre- and post-submit am: f2f012b7 am: 8ba3906b...

Add tests to libaudioclient pre- and post-submit am: f2f012b7 am: 8ba3906b am: 9f03ab21 am: 8e0bc37c

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2190007



Change-Id: I3c5ebd8a54946e330475b0363a2eae138c1b7547
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>