SamsungQualcommRIL: fix handoff for good.

OperatorCheck: Add last known of good config when the array is null.
When the radio reset, it calls data connect. This fixes cases where
data is null because of this issue and causes apn to be null out.

Change-Id: Ic8e1d22f56db77ef698d3a89ecf27d30a7a2ddd8
Merge "Telephony: Read IMSI using SIM I/O for CSIM/RUIM" into cm-10.2
Merge "Do not update External state until we receive card status." into cm-10.2
Merge "Telephony: Delay SIM IO until SIM_READY" into cm-10.2
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 the empty provisioning apn.

Change-Id: I6ca4fd172e2ecc64ca7a2c3fbca5327be61e7b5c