Recents clear all app lock option

Change-Id: I254ecbe45c14d47a60e7d39c011421e4c9c276a0

Conflicts:
	packages/SystemUI/res/menu/recent_popup_menu.xml
	packages/SystemUI/res/values/mahdi_strings.xml
	packages/SystemUI/src/com/android/systemui/recent/RecentsHorizontalScrollView.java
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java
	packages/SystemUI/src/com/android/systemui/recent/RecentsVerticalScrollView.java