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: 6810a423 am: bb20ba64

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

Change-Id: I9e8cc079dcbf214a94b2ddeffd2219b809a0186b