Include IMS service state when determining GSM/CDMA Phone service state.

Also, made both getServiceState calls identical, it would be desirable
to promote getServiceState to PhoneBase but since the mSST variable is
Object Specific that wasn't trivial to do, so for now the code is
duplicated.

Bug: 17326988
Change-Id: I548abf213ab098cd31e9f9c90d231135fba3be6a