API changes in GatewayInfo, Response, and PropertyPresentation (1/4)

* GatewayInfo: handle -> address, becomes SystemApi
* Response: hidden
* PropertyPresentation: class goes away, constants move to
  TelecommManager

Bug: 17329632

Change-Id: I6577ed95ed1535aaf66dfa1853eee85ec6c506d2
9 files changed