Merge "Add logging for zen mode events." into udc-dev am: 34bc8be6 am:...

Merge "Add logging for zen mode events." into udc-dev am: 34bc8be6 am: 4f73c8e0 am: 847288eb am: 76eba1d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22605299



Change-Id: I0a64e9fcc821ecfd922bc5944081d2d55e0dc3d4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>