Merge "Revert "[hotword] make service exemption configurable via sysprop""...

Merge "Revert "[hotword] make service exemption configurable via sysprop"" into udc-dev am: 11cd4696 am: de2238d3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23245838



Change-Id: Ia570a97e09ef3b331adf45fe05e31bb4f35fb3b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>