Merge "Add role guarded APIs for subscribing to keyguard locked state in KeyguardManager." into tm-dev am: 8d50e04a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16947290

Change-Id: I912e4d93887fa8ec3c4539e48e28c7c381c394ea