Display Supplementary Service Notification

New interface added to support supplementary service notification
messages.

Conflicts:
telecomm/java/android/telecom/Connection.java
telecomm/java/android/telecom/ConnectionService.java
telecomm/java/android/telecom/ParcelableCall.java
Change-Id: I13dc423873e474b87f614ee2473bd997d6d48ffc