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