Revert "FaceUnlock: Check if faceunlock is disabled"

This reverts commit 17e30f4c7bc0dea30fd2103356f89f59734e4d0e.
Revert "Don't recreate keyguard for MCC/MNC changes."

This reverts commit a59d91deeb844894ab2bbdbd9b7a0443b5dc6c0a.
Revert "Send out USER_PRESENT broadcast on screen on if lockscreen is disabled."

This reverts commit 2ea14518be93823ef885027fa601b0a3b994618f.
Revert "Don't let apps disable the SIM PIN entry screen."

This reverts commit b06e9b7ad1f5fd2d938a8a8b52857913f40afab3.