Hotword: Use new Audio Egress metrics instead of older one am: 81f82921

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20751789



Change-Id: I6b6db27a0ef0a7438ef1a35feac6d247c351695b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>