Settings: Lock before unlock the new way (2/2)

for more information see fb commit please.
target selection if lock before unlock is activated
will be enabled and shows the repective settings dependend
on if it is a phone or tablet

Based on @kufikugel commit (97d8a510e90a7bad58d8691d6f83c6e64d2b907b) and adapted to work in LockscreenInterface.java of CyanogenMod

Thanks to him!

Change-Id: I60b114e2c7c5adffd079be0ba44ee31d1f02990e