SlimRecents: add floating window menu

Change-Id: I63894fb8551b881c45c991bc30353b3dc4f3e43c
FWB: Allow disabling of FC dialogs (1/2)

Change-Id: If87aa74ebb45849f6e5fe3a53ce9beeaac28f624

Conflicts:
	core/java/android/provider/Settings.java