Merge "Always report keyguard-going-away even if empty" into udc-dev am: 26994f4d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22236190



Change-Id: I25e4687760a09e44be2e3930d00401ec2dd80313
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>