Revert "Merge "PEEK [1/2]" into kitkat"

This reverts commit 90f38881f0e2ba1224f011b0605cbe6f75fa8d48, reversing
changes made to 8b1d507c7e58a4c85881bea36e0f6f8ac69554b3.

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationPeek.java
	packages/SystemUI/src/com/android/systemui/statusbar/notification/SensorActivityHandler.java
Revert "Merge "PEEK [1/2]" into kitkat"

This reverts commit 90f38881f0e2ba1224f011b0605cbe6f75fa8d48, reversing
changes made to 8b1d507c7e58a4c85881bea36e0f6f8ac69554b3.

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationPeek.java
	packages/SystemUI/src/com/android/systemui/statusbar/notification/SensorActivityHandler.java