Telephony: Bring back older IMSI method for legacy RIL

Non-MSIM RIL don't support the newer method.

Change-Id: Iccef3086f28ac1ae72c85b9143e6df84e3b1c08b
DCTracker: Relax the dummy profile check

This will always create a stubbed APN on legacy CDMA.
Fixes 3G data not connecting without the APN.

Change-Id: I6446bf6addb1f56b8a29de7c3f74a421e7f3a70c
DCTracker: Fix UICC load stall

Revert to AOSP behavior if newIccRecords == null.

Change-Id: I9d914892f3683cae3b4feddcaa1336b95149d2e5