DO NOT MERGE Block the user from entering safe boot mode
Block the user from entering safe boot mode if the DISALLOW_SAFE_BOOT
policy is set.
CYNGNOS-3235
Bug: 26251884
Change-Id: I4945d5d676928346c11ea305a5b6a2e1a42e94e6
(cherry picked from commit 7fbb93d4)
(cherry picked from commit 7687ee10)