telephony: Set roam though same named operator

Show roaming icon though same named operators.
Though same mcc and same operator name, some operator want to roam.
For example, users of 40485 should see the roaming icon as using 40483
network though same Reliance network.

Bug: 10699045, 10703022
Change-Id: Ife1024ef10a29e43e32040800b25feca9f51fb62