Telephony: Fix LTE CB Sms for dual-mode devices

Ignore 3gpp location information when it is not available.
This is required to support dual-mode devices such as CDMA/LTE devices
that require support for both 3GPP and 3GPP2 format messages.

Change-Id: Ie5d6372ef7e8da6893800e05a83ba840b7fd31f6