Launcher3: show / hide homescreen icon labels

Conflicts:
	res/values/matricom_strings.xml
	res/xml/preferences.xml
	src/com/android/launcher2/preference/PreferencesProvider.java
	src/com/android/launcher3/Folder.java
	src/com/android/launcher3/FolderIcon.java
	src/com/android/launcher3/Launcher.java
	src/com/android/launcher3/Workspace.java