Custom Navring Targets (2/2)

All credits to CyanogenMod
This allows up to 3 custom navbar targets

Conflicts:
	AndroidManifest.xml
	res/values-sw600dp/dimens.xml
	res/values/pa_strings.xml
	res/xml/settings_headers.xml
	src/com/android/settings/Utils.java

Conflicts:
	AndroidManifest.xml
	res/values-sw600dp/dimens.xml
	res/xml/navbar_settings.xml
	src/com/android/settings/Utils.java

Conflicts:
	res/values/dimens.xml
	res/xml/display_settings.xml