Change default cdma subscription to RUIM

- modem has made changes for the default
cdma subscription to be RUIM, however, the
default cdma subscription for telephony is
still NV. The UI is showing as NV after the
first boot up, which does not match modem
- Change the default subscription value to RUIM

Change-Id: I2301788ae083f477e0bfd2cecf221e8e002e51f1
CRs-Fixed: 927032