Revert "Recents: Launch as Floating App"

This reverts commit 1fda08954681b002d384958de20450e00b797f20.

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