Clear All Apps button added in Recent Panel (1/2)
Thanks to benjamingoodwin && xplodwild
Mine rearranged, modified and adapted.

Change-Id: I276fa1bf5f99a66626e046f5b697ac66d3da5e5b

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java