Telephony: Bring back older IMSI method for legacy RIL

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

Change-Id: Iccef3086f28ac1ae72c85b9143e6df84e3b1c08b
SamsungQualcommRIL: fix power on and off state

 remove obsolete code

Change-Id: Ib7b288e50e603ff91ac715113db9dc1769a3a09f
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
DcTracker: wait for default apn to disconnect before setting up new

Including the removal of a previous attempt to fix this issue:

Revert "Frameworks : Make sure a reply is sent when not provisioning default apn"

This reverts commit 8733a2d2a1c5c88f661c4d6947cc9eb8f27d4874.

Revert "DcTrackerBase: Dont provision APN if default is disconnecting"

This reverts commit cf13f20b88c5add9d2e8ea74b8fe9fbeb88101b2.

Change-Id: I8181dca843eb3de4be68c5b2be6aac9d81732558