Set CDMA data roaming based on TSB58 roaming indicator if voice is not in service

Existing implementation:
1. CDMA voiceRoaming is set based on regState and roaming indicator.
2. CDMA dataRoaming is set based on regState only.
3. CDMA dataRoaming is overwritten with voiceRoaming if voice is
   in service.

Issue:
If voice is not in service then the CDMA dataRoaming set based on
regState alone could be incorrect because it didn't use roaming
indicator from modem.

Fix:
This change sets CDMA dataRoaming based on TSB58 roaming indicator
(similar to setting voiceRoaming) if voice is not service.

Note: As per VoiceRegStateResult from radio types.hal the TSB58
roaming indicator shall be sent if device is registered on a
CDMA or EVDO system.

Test: Forced device to Evdo only and verified roaming state
Bug: 37917767
Change-Id: I3cc7fff61cea296afe17215a33b1b4c80972db13