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

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



Change-Id: I5bf8b3ec7f6228f96beafb096de2b5d82f6151d9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>