Added keyboard InputType in autofill form (#681)

Author: Alabhya268

form_app/lib/src/autofill.dart

@@ -45,27 +45,31 @@ class _AutofillDemoState extends State<AutofillDemo> {
                       autofillHints: [AutofillHints.familyName],
                     ),
                     TextField(
+                      keyboardType: TextInputType.emailAddress,
                       decoration: InputDecoration(
                         hintText: '[email protected]',
                         labelText: 'Email',
                       ),
                       autofillHints: [AutofillHints.email],
                     ),
                     TextField(
+                      keyboardType: TextInputType.phone,
                       decoration: InputDecoration(
                         hintText: '(123) 456-7890',
                         labelText: 'Telephone',
                       ),
                       autofillHints: <String>[AutofillHints.telephoneNumber],
                     ),
                     TextField(
+                      keyboardType: TextInputType.streetAddress,
                       decoration: InputDecoration(
                         hintText: '123 4th Ave',
                         labelText: 'Street Address',
                       ),
                       autofillHints: <String>[AutofillHints.streetAddressLine1],
                     ),
                     TextField(
+                      keyboardType: TextInputType.number,
                       decoration: InputDecoration(
                         hintText: '12345',
                         labelText: 'Postal Code',
@@ -80,6 +84,7 @@ class _AutofillDemoState extends State<AutofillDemo> {
                       autofillHints: <String>[AutofillHints.countryName],
                     ),
                     TextField(
+                      keyboardType: TextInputType.number,
                       decoration: InputDecoration(
                         hintText: '1',
                         labelText: 'Country Code',