SamsungQualcommRil: reversed engineered implimentation of dial() from touchwiz

derived from Ricardo Ceq. and Tony Layher work.

Change-Id: Ie17762a5bce84791f85c98dfca88f576b2f5aeb9
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