Send telephony notifications to appropriate users.

- Show notifications with no PII implications to all users.

- Show voicemail notifications to all users which can make outgoing
phone calls. (and cancel notifications for all users when read)

- For stateful/ongoing notifications (voicemail, call forwarding,
network selection), cancel notifications for all users when canceled.

- For data disconnected due to roaming, only cancel for current user.

- For notifications  which the user can't do anything because they
aren't the primary user, show the notification, but provide a null
content intent. Refactored some notifications to be created by
builders to make this cleaner.

Bug: 17950718
Change-Id: I07ac2f7abd8c9a75cdfec1a3123276ca747268df
1 file changed