PhoneInterfaceManager needs to override these CallModeler abstract functions now that it implements CallModeler.Listener

Change-Id: I1177d01b2c8d37258c0b5ea77f29b6af735ee181
MSimPhoneGlobals: CallGatewayManager is now a singleton

Change-Id: Iceb66100524eafcd96cee55f77b7d7d31d82bf2d
MSimPhoneGlobals: update PhoneInterfaceManager.init invocation

Change-Id: Idcd79088417b86a73ca65d5e27c0a9786b65a6f6