Merge "[hotword] make service exemption configurable via sysprop" into udc-dev...

Merge "[hotword] make service exemption configurable via sysprop" into udc-dev am: 4a30c1d2 am: 6a86d252 am: 261d7029 am: 4b59535f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23211877



Change-Id: If5ded8bc3078cc328d250c2cd66c4457185e8a34
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>