Revert "Frameworks: Lockscreen Blur"

This reverts commit 9c2c8c8902b1fc81308ad84697a1e228d926d3a8.

Conflicts:
	services/java/com/android/server/power/DisplayPowerController.java
Revert "Lockscreen: See through (1/2)"

This reverts commit 4b31c0bff202f3c09198cdd41ad69f8afeb2635a.

Conflicts:
	core/java/android/provider/Settings.java
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
[1/2] Base: Lockscreen blur

Show the content behind lockscreen, blurred.

Settings: https://gerrit.omnirom.org/#/c/4702/

Change-Id: I0d7ee20d6b415567f0051d716ba0db2e55511e91

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