Telephony: DcTracker: Fix CDMA APN Data issues.

Fixes Data on CDMA when APN Match cannot be found
Original commit: cd2585eb3f4e2db5c8a36382ffa644fa0d1515b4

PS2: Fixed small derp that was breaking build
PS3: Change author name to original author

Change-Id: Iad7737635686fdb9d7d35099d3cf615eb47a3dfd
Telephony: check if the provisioning apn is actually empty before

checking if they are equal.  Fixes cases where the stubbed apn
(empty) equal to the empty provisioning apn.

Fixes no IP issues on CDMA data types.

Change-Id: Id7bda83778f5ce59c87463c4d44fc5768dbc4a08