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

Merge "Revert "[hotword] make service exemption configurable via sysprop"" into udc-dev am: 11cd4696 am: 36cb23ae

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



Change-Id: I9938d1a05c3cebcd5080e06a2010e8e88d55f349
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>