Change the Gallery AnimationDemo category (#5041)

examples/flutter_gallery/lib/gallery/item.dart

@@ -66,12 +66,6 @@ final List<GalleryItem> kAllGalleryItems = <GalleryItem>[
     buildRoute: (BuildContext context) => new ContactsDemo()
   ),
   // Components
-  new GalleryItem(
-    title: 'Animation',
-    subtitle: 'Material motion for points and rectangles',
-    routeName: AnimationDemo.routeName,
-    buildRoute: (BuildContext context) => new AnimationDemo()
-  ),
   new GalleryItem(
     title: 'Buttons',
     subtitle: 'All kinds: flat, raised, dropdown, icon, etc',
@@ -229,6 +223,13 @@ final List<GalleryItem> kAllGalleryItems = <GalleryItem>[
     buildRoute: (BuildContext context) => new TooltipDemo()
   ),
   // Styles
+  new GalleryItem(
+    title: 'Animation',
+    subtitle: 'Material motion for points and rectangles',
+    category: 'Style',
+    routeName: AnimationDemo.routeName,
+    buildRoute: (BuildContext context) => new AnimationDemo()
+  ),
   new GalleryItem(
     title: 'Colors',
     subtitle: 'All of the predefined colors',

examples/flutter_gallery/test_driver/transitions_perf_test.dart

@@ -54,6 +54,7 @@ final List<String> demoTitles = <String>[
   'Time picker',
   'Tooltips',
   // Style
+  'Animation',
   'Colors',
   'Typography'
 ];