Merge "Make mIsDeviceLockedForUser synchronized." into rvc-dev am: 98f62674e0 am: 88d3e7bb55

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/security/+/12850125

Change-Id: I472e9648eb2b8bb9d95b5ca53e25b9395d9319f8