telephony: new MotoTegraRIL class

The Atrix RIL has an extra field on the Parcel that breaks the telephony
code if not skipped. It is also known to report 'world mode' while being
a GSM phone. This patchset adds a RIL class to fix these issues.

Change-Id: Ic81a868dda2b7ad3c50b220fe268994277d60663