Keyguard: smooth background change derp fixes

no idea how this could happened. Cleanup, fixes and updates (thanks kyril)

Change-Id: Ia0e4d0000db72b5cdb6fede03791805e34fa311d

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Fix: Lockscreen Blur Rotation

Credits to David L.-W (David96)
https://github.com/AOSPAL/android_frameworks_base/commit/f80b748

Modifications made to address the issues noted in original commit

Change-Id: I721e7f8554433b903209da5587ac1dfcd83420cd

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Lockscreen Blur: fix for coverflows

fix showing background when playing next music

Change-Id: Ic95965f34b6bdb1c04d5fa680b5f8b81adb3d952