adding country option to register page

lib/screens/patients/register_patient/RegisterPatientPage.dart

@@ -53,6 +53,7 @@ class _RegisterPatientPageState extends State<RegisterPatientPage>
   @override
   Widget build(BuildContext context) {
     final screenSize = MediaQuery.of(context).size;
+
     ///TODO Elham* Add Translation
     return BaseView<PatientRegistrationViewModel>(
       builder: (_, model, w) => AppScaffold(

lib/screens/patients/register_patient/RegisterSearchPatientPage.dart

@@ -42,7 +42,6 @@ class _RegisterSearchPatientPageState extends State<RegisterSearchPatientPage> {
 
   dynamic country;
 
-  //var countryName = ["Saudi Arabia", "UAE"];
   bool isSubmitted = false;
 
   TextEditingController _phoneController =
@@ -255,6 +254,11 @@ class _RegisterSearchPatientPageState extends State<RegisterSearchPatientPage> {
                     setState(() {
                       isSubmitted = true;
                     });
+                    if (country == null) {
+                      countryError = TranslationBase.of(context).fieldRequired;
+                    } else {
+                      countryError = null;
+                    }
                     if (isFormValid()) {
                       GifLoaderDialogUtils.showMyDialog(context);
                       CheckPatientForRegistrationModel