Lockscreen transparency, blur and rotation

ps2: i spelled if incorrectly
ps3: fix blur disable
ps4: smooth background change
ps5: fix transparency

Change-Id: I247bf8ae1fd637d70183c40b83d6bb486e3cfcf9

Conflicts:
	core/java/android/provider/Settings.java
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	policy/src/com/android/internal/policy/impl/keyguard/KeyguardServiceWrapper.java
	services/java/com/android/server/power/DisplayPowerController.java