For Work Challenge feature "Screen lock" menu item for managed
profile is completely disabled in case, if
PASSWORD_QUALITY_MANAGED is set and user choose not to use
the same lock.
BUG: 25549437
Change-Id: I201aecb91ba8c2868e57e2014d125b149aeac377
UX requested that we have the settings directly in Security instead
of having a separate screen as implemented previously.
Bug: 26806582
Change-Id: I55c44848621498afe63d3207a52c974c58f9eb78