Misc Telecomm API changes

The CL contains the following Telecomm API changes:
  - move CallFeatures into CallCapabilities
  - add Connection.setHandle(URI, CallPropertyPresentation)
  - add Connection.setCallerDisplayName(String,
    CallPropertyPresentation)
  - add Connection.swapWithBackground: this is used to swap a
    CDMA call with its background call
  - add StatusHints.getExtras: this is used to display
    additional status info such as long distance rates
This CL also includes InCallServcie, and RemoteConnection
plumbing for the above.

Change-Id: Iaffe0b84cea6003f2a9b9d8b30676743d2b236d4