Revert "Lockscreen Notifications [1/2]"

This reverts commit 7388fb3af4107db2bd8c5f8ead0b9a3cef5dd72b.

Conflicts:

	core/java/android/provider/Settings.java
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java