Revert "FaceUnlock: Check if faceunlock is disabled"

This reverts commit 63ad873557f69aed9b853a8391ec4f4949db8b81.
Revert "Don't recreate keyguard for MCC/MNC changes."

This reverts commit 310ca4a372d97fcf9f6782e0fbc639c8e1a86224.
Revert "Don't let apps disable the SIM PIN entry screen."

This reverts commit 7c40d24aa4aedfc8a3c0c77288a4b3d8b68dace5.