Merge "Add and update some hotword detection metrics" into tm-dev am:...

Merge "Add and update some hotword detection metrics" into tm-dev am: 5e1904c3 am: e9412cf6 am: e093f8d9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17701596



Change-Id: I05c274ce9be87d16ff3be0bacdf057adc8c957d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>