SamsungQualcomm: Skip new requests on old RILs

Pre-8 RIL implementations lack support for both
RIL_REQUEST_SET_UNSOL_CELL_INFO_LIST_RATE and
RIL_REQUEST_IMS_REGISTRATION_STATE. Ignore both of
these to prevent lingering unanswered requests.

Change-Id: I4cfbfe52a14dea636823cb54a0cc4675de80698b
SamsungQualcommRIL: allow mQANElements to be device specific

The new RIL blobs for i9305 require that mQANElements = 6.
This patch simply introduces a new system property that can be used
to adjust the value of mQANElements if required.

Change-Id: I8a69bb6462552bf2374d963d82882315e8c77cef
SamsungQualcomm: Add support for Samsung's EMS dialing request

At least some samsungs require a specific emergency dial.
JF and D2 have been identified as _not_ requiring it, so it's
not for all Samsung qualcomms.

Change-Id: Id43728942f2d964a84f7486b1269d2da8305fdf6
SamsungQualcommRIL: fix power on and off state

 remove obsolete code

Change-Id: Ib7b288e50e603ff91ac715113db9dc1769a3a09f