Fix: Ensure lockscreen see through setting persists after reboot

If see through was enabled and the device was rebooted,
the user had to toggle the setting off and on again to activate.

Change-Id: Iccd6fec3a150b4104ae1ce3de6ce7c2359b9ac29
Fix: Correct possible null pointer when enabling see through lockscreen

Change-Id: I697375c45751e6d60cdaa78bfe3884907c724fca
PS2: Remove unused variable
Fix: Lockscreen Blur Rotation

Change-Id: I8113b1ce4fa36bbb2ddd5731a612bfaef97be565