Merge "Add support for onReject and onError for external hotword." into tm-dev...

Merge "Add support for onReject and onError for external hotword." into tm-dev am: 90579f32 am: 5ec4c563 am: 72d9e091 am: 87382801

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18308197



Change-Id: I3025723924b26e865bb4ed48cbad44344537f025
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>