Merge "Enable hearing aids U feature flags" into udc-dev am: c6b158b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21806854



Change-Id: I9e80ad0c0d6e1d64990bb3dbf91b93f9ccc2989c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>