Add an option to allow a (subtle) notification vibration during calls.

this commit replaces the broken mms feature which we revert now.

Change-Id: I8a5e1d15d17d56089158b24f9a4b246ae6e60285

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml
	services/java/com/android/server/NotificationManagerService.java