Flutter 3.24 update, Add CarouselView examples to demo 3 (#2377)

This PR is to include `CarouselView` to M3 demo app.


https://github.com/user-attachments/assets/7db76c06-aa7e-4461-9baa-51fd5c4e6b38



## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] All existing and new tests are passing.

---------

Co-authored-by: Eric Windmill <ewindmill@google.com>

material_3_demo/test/component_screen_test.dart

@@ -10,7 +10,7 @@ import 'package:material_3_demo/main.dart';
 
 void main() {
   testWidgets('Default main page shows all M3 components', (tester) async {
-    widgetSetup(tester, 800, windowHeight: 7000);
+    widgetSetup(tester, 800, windowHeight: 7500);
     await tester.pumpWidget(const App());
 
     // Elements on the app bar
@@ -67,6 +67,9 @@ void main() {
     expect(find.widgetWithText(Cards, 'Filled'), findsOneWidget);
     expect(find.widgetWithText(Cards, 'Outlined'), findsOneWidget);
 
+    // Carousels
+    expect(find.byType(CarouselView), findsNWidgets(2));
+
     // Dialogs
     expect(find.widgetWithText(TextButton, 'Show dialog'), findsOneWidget);
     expect(find.widgetWithText(TextButton, 'Show full-screen dialog'),