Telephony: Bring back older IMSI method for legacy RIL

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

Change-Id: Iccef3086f28ac1ae72c85b9143e6df84e3b1c08b
DCTracker: upgrade stubbed apn to Qcril Standard.

* this is still needed because sprint lte and legacy
 has the same operator numeric are not passing the check to
 lte apn is filled and not passing mDps.empty() check.
Change-Id: Ic13235744fca561cff4d49ae5c799420c30b3840
SamsungQualcommRIL: fix power on and off state

 remove obsolete code

Change-Id: Ib7b288e50e603ff91ac715113db9dc1769a3a09f
Merge "Telephony: Bring back older IMSI method for legacy RIL" into cm-11.0
Merge changes Ib7b288e5,Ic1323574 into cm-11.0

* changes:
  SamsungQualcommRIL: fix power on and off state
  DCTracker: upgrade stubbed apn to Qcril Standard.