Last App Toggle (for PIE)

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarView.java
	packages/SystemUI/src/com/android/systemui/statusbar/view/PieMenu.java

Change-Id: I33a42e9594817f0240ff583fbd2d98a216774a3c
Not needed

Change-Id: I68c6c4f37f4a80680502231d9f55e82e08b215b5
Fix Pie layout

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/PieControl.java

Change-Id: I36bc51289061c787154ef83db09d58db41ab9753
Pie: Fix dependency on Last App target for proper alignment.

Change-Id: I58bc0bb2cc00bc1509099ff87062f3fddfbeafaa