KAT-50: Changed state class from _AmbulatoryState to AmbulatoryState

rescueapp/lib/Ambulatory.dart

@@ -9,9 +9,9 @@ class Ambulatory extends StatefulWidget {
   final String title;
 
   @override
-  _AmbulatoryState createState() => _AmbulatoryState();
+  AmbulatoryState createState() => AmbulatoryState();
 }
-class _AmbulatoryState extends State<Ambulatory> {
+class AmbulatoryState extends State<Ambulatory> {
 
   @override
   Widget build(BuildContext context) {