Revert lockscreen wallpaper and blur radius

this reverts:
6f41843 Revert "Base: Lockscreen blur radius and custom background (1/2)"
f275ab8 Revert "temp fix for lockscreen blur not setting value at 0"
ac50a90 Revert "Lockscreen Style options: clean up"
Custom lockscreen

Accessible via launcher wallpaper selector and
Settings - Display - Wallpaper - Lock screen

Change-Id: I2e4722d1a6d4ba80a3c656306ceb251d630a8e21

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java