Telephony: Dismissable voicemail notifications

Ported from cm-10.2:
http://review.cyanogenmod.org/#/c/35023

Change-Id: Iccd01210cdd9a43167392fc09debbfc4cb23b6f6
Merge remote-tracking branch 'github/cm-11.0' into bean
part 2 of LTE toggle support

Change-Id: I21050a18269c15be054e35f5f75fd339e1f270f5

Conflicts:
	src/com/android/phone/PhoneInterfaceManager.java