Implement device lock state listener am: f44dc885d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3368759

Change-Id: I9305c69ff4443413abfef847947908e95c1c75f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>