Add error dialogs to Telecomm

* Add error dialog popups for DisconnectCause.INVALID_NUMBER and
VOICEMAIL_NUMBER_MISSING
* Move ErrorDialogActivity from Telephony to Telecomm
* NewOutgoingCallBroadcaster.processIntent now returns an error code
rather than a boolean

Bug: 17209051
Bug: 17196776
Change-Id: Ifc8b23472510fefc0c2763d28f9c990b4598cadd