Phone: Enable LTE for GSM LTE phones (part I)

Change-Id: I580c37f3272c8cc8363e8db5b1c227bf6f74a04a
Phone: Enable LTE for GSM LTE phones (part I)
> Based on this commit:
> https://github.com/SlimRoms/packages_services_Telephony/commit/77328494a6b82576b6d0736e1c9b50de4386362c