Settings: forward port HeadsUp options (2/2)

-Global on/off
-Blacklist and Do not disturb

Altaf-Mahdi: Materialized to match Blacklist and profiles

Conflicts:
	AndroidManifest.xml
	res/values/custom_strings.xml
	res/xml/notification_settings.xml
	src/com/android/settings/notification/NotificationSettings.java

Conflicts:
	res/values/strings.xml
HeadsUp: add timeout option (2/2)

Conflicts:
	res/values/custom_arrays.xml
	res/values/custom_strings.xml