Moved veggieseasons out of experimental (#752)

veggieseasons/lib/screens/favorites.dart

@@ -0,0 +1,53 @@
+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:provider/provider.dart';
+import 'package:veggieseasons/data/app_state.dart';
+import 'package:veggieseasons/data/veggie.dart';
+import 'package:veggieseasons/widgets/veggie_headline.dart';
+
+class FavoritesScreen extends StatelessWidget {
+  FavoritesScreen({this.restorationId, Key key}) : super(key: key);
+
+  final String restorationId;
+
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoTabView(
+      restorationScopeId: restorationId,
+      builder: (context) {
+        final model = Provider.of<AppState>(context);
+
+        return CupertinoPageScaffold(
+          navigationBar: CupertinoNavigationBar(
+            middle: Text('My Garden'),
+          ),
+          child: Center(
+            child: model.favoriteVeggies.isEmpty
+                ? Padding(
+                    padding: const EdgeInsets.symmetric(horizontal: 24),
+                    child: Text(
+                      'You haven\'t added any favorite veggies to your garden yet.',
+                      style: CupertinoTheme.of(context).textTheme.textStyle,
+                    ),
+                  )
+                : ListView(
+                    restorationId: 'list',
+                    children: [
+                      SizedBox(height: 24),
+                      for (Veggie veggie in model.favoriteVeggies)
+                        Padding(
+                          padding: EdgeInsets.fromLTRB(16, 0, 16, 24),
+                          child: VeggieHeadline(veggie),
+                        ),
+                    ],
+                  ),
+          ),
+        );
+      },
+    );
+  }
+}