Note: this entailed locking datetime settings not into portrait
like everything else in the setup process, but landscape, because
the existing xlarge layout wasn't rearranging itself into a portrait
alignment very well. I can give it another try later if I can have
some help from UE.
Change-Id: Ia8ce8e8292ed768bd117beedf3d94a287e658f4b
This reduces the dependency of LockScreen preference screens
on a particular device size by using centering logic instead of
absolute offsets/sizes.
Change-Id: I6ff9e71dc122e12493148437dda647820ae0f308
