add CTS coverage for StreamingCall & CallStreamingService

New CTS API code coverage for the following classes

StreamingCall
---------------------
  + getComponentName()
  + getDisplayName()
  + getAddress()
  + getState()
  + getExtras()
  + requestStreamingState(int)
  + writeToParcel(Parcel, int)
  + describeContents()
  + CREATOR

CallStreamingService:
---------------------
  + onCallStreamingStateChanged
  + onCallStreamingStopped

Flag: EXEMPT adding test coverage
Fixes: 339022757 (StreamingCall coverage request)
Fixes: 339024271 (CallStreamingService coverage request)
Test: CallStreamingTest
Change-Id: I56da3296d940d09ddeed30ec3809cdc38150467d