added routingAPI function

HelperFunctions.java

@@ -17,4 +17,11 @@ public class HelperFunctions {
         double[] returnArray = coords;
         return returnArray;
     }
+
+    public double[][] routingAPI(double[] startCoords, double[] destinationCoords) {
+        //ideally this would return a series of coordinates, but for the sake of the demo it's just
+        //going to concatenate the start and end into a 2x2 array with just those two steps
+        double[][] routeArray = {startCoords, destinationCoords};
+        return routeArray;
+    }
 }