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: 4f2c1cfa

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



Change-Id: I5f531411a97adbb7d8ce3afcfd16b01cb1e4aae7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>