Lockscreen Blur: Allow setting blur radius (2/2)

This commit was first adapted by @lion0738
This commit was Re-committed by @Namja in Triangles

Change-Id: Ibc204493a213332006ff40a53c2a9c88a21f2b0a

Conflicts:
	res/values/cm_strings.xml
	res/xml/lockscreen_interface_settings.xml
	src/com/android/settings/cyanogenmod/LockscreenInterface.java