Merge "audio policy: workaround for call signalling tones with hearing aids"...

Merge "audio policy: workaround for call signalling tones with hearing aids" into tm-dev am: 267bdb6f am: 9ed657a2 am: 2b8de3fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/17730878



Change-Id: I11a3f0df765acf8a7587aba325f555ce76450116
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>