Merge "Make the notif panel focusable during screen off so touch events don't go to the app behind." into sc-dev am: ce9883b6 am: 5270a995 am: f766d274

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15097911

Change-Id: I7208b9d01470b1bd8de99ce57b0a32507a07e140