telephony: DataConnection: support old RILs

Older RILs require different technology value

Change-Id: Ia72bb1229132a00b5c343c0467823b895f0338d0
CdmaLte: Fix 3G reported as unknown on certain devices

Some older CDMA/LTE RILs only report VoiceRadioTechnology which
results in network Unknown. In these cases return
RilVoiceRadioTechnology for RilDataRadioTechnology.

Set ro.telephony.ril.v3=usevoicetechfordata to enable

Change-Id: Icfbc8739993beae1b0f024bf71374751aa200a01
CdmaLte: call setDataRegState when using RilVoiceRadioTechnology for data

When using the VoiceRadioTechnology to set the DataRadioTechnology
(by using usevoicetechfordata in ro.telephony.ril.v3), the actual
data registration state needs also to be updated with the service
state depending on the VoiceRadioTechnology. Without this, no data
connection would be established.

Change-Id: I72cd3ef2d40e62cf408cf79ee8d884da8675c1ca