It is possible that older platforms may have not cleared the lock pattern,
but instead only checked this flag to determine the lock pattern enabled
state. In such cases, upgrading to a platform with that only checks the
lock pattern can lead to the lock screen being re-enabled by accident.
These new methods allow this condition to be identified and resolved.
Bug: 26029690
Change-Id: I8f7ebc0e1915049afe49c219c87010aa38a16244
4614596a39