libril: HTC8960RIL: add flag to force CMDA+LTE network mode

m7wls needs to force LTE on CDMA network type, else it comes back as
WCDMA preferred. This is pretty hacky but it keeps it out of the CM
telephony stack.

Change-Id: Id5e5fe4af7ebfa011ff6765b942c72020cc68af4
Merge "libril: HTC8960RIL: add flag to force CMDA+LTE network mode" into jb-mr1