Merge "libaudiohal: Remove unused 'using' directive" into udc-dev am: 10207c29 am: b5e3a3b3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/21947202



Change-Id: I6843985a7257e1851a5ee11c8b1348c1f913397d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>