Add lockscreen rotation as an optional rotation setting (2/2)

This will allow the user to select wether or not to use the
rotation settings for the lockscreen.  This is dependent
upon the rotation setting being checked.
Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I14bb6dc895244f0b93474364194b087c56a801e6