minor changes in constants class

GMCabsDriverAssistantSolution/Constants.cs

@@ -7,5 +7,7 @@ namespace GMCabsDriverAssistant
     partial class Constants
     {
         public const string VoucherScanUseFrontCamera = "VoucherScanUseFrontCamera";
+        public const int RYDO_TYPE = 1;
+        public const int METER_TYPE = 2;
     }
 }