SamsungQualcommRIL: evaluate samsungDriverCall in responseCallList()

* fixes race condition where mRilVersion is not valid when setPhoneType() is
    called. When this happens, the auto-enable of samsungDriverCall for v7 RIL's
    is broken. The result is that hanging up does not work.
Change-Id: I2642110d3683648aaff722c86d3dc21cbd9ee802