Repository: flutter
Issue: Dialog animations not following Material Design Specification
Labels: framework,a: animation,f: material design,a: fidelity,has reproducible steps,P2,team-design,triaged-design,found in release: 3.24,found in release: 3.26

### Steps to reproduce

1. Create a dialog
2. Open the dialog (and see)
3. Close the dialog (and see)

### Expected results

The Material Design Specification states, "android components expand and collapse along the x or y axis as they enter and exit". The dialog widget should expand from the top to the bottom and collapse from the bottom to the top. I attached an example in the screenshot section.

https://m3.material.io/styles/motion/transitions/transition-patterns#a8acc8d4-8de2-4602-a9a3-945d44d08bad

### Actual results

The dialog fades into the view. This does not meet the requirements given by the specification, and more looks like a relict from MD2.

### Code sample

<details open><summary>Code sample</summary>

```dart
import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

class MainApp extends StatelessWidget {
  const MainApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: MainScaffold(),
    );
  }
}

class MainScaffold extends StatelessWidget {
  const MainScaffold({
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextButton(
            onPressed: () {
              showDialog(
                  context: context,
                  builder: (context) {
                    return AlertDialog(
                        icon: const Icon(Icons.delete),
                        title: const Text("Permanently delete?"),
                        content: const Text(
                            "Deleting the selected messages will also remove them from synced devices."),
                        actions: [
                          TextButton(
                              onPressed: () => Navigator.pop(context),
                              child: const Text("Cancel")),
                          FilledButton.tonal(
                              onPressed: () => Navigator.pop(context),
                              child: const Text("Delete")),
                        ]);
                  });
            },
            child: const Text("Open Dialog")),
      ),
    );
  }
}
```

</details>


### Screenshots or Video

<details open>
<summary>Screenshots / Video demonstration</summary>

| Flutter behavior | Material specification (1 is android) |
|-|-|
| ![](https://github.com/user-attachments/assets/59474d57-3a12-4e2d-aa34-9867e05b441c) | ![dialogMaterial-ezgif com-resize](https://github.com/user-attachments/assets/bac3b1ee-cad6-4783-840d-041673302339) |

</details>


### Logs

<details><summary>Logs</summary>

> Not required

</details>


### Flutter Doctor output

<details><summary>Doctor output</summary>

```console
[√] Flutter (Channel stable, 3.22.2, on Microsoft Windows [Version 10.0.22631.4169], locale de-DE)
    • Flutter version 3.22.2 on channel stable at E:\dev\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 761747bfc5 (4 months ago), 2024-06-05 22:15:13 +0200
    • Engine revision edd8546116
    • Dart version 3.4.3
    • DevTools version 2.34.3

[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at C:\Users\jakob\AppData\Local\Android\sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
    • Java version OpenJDK Runtime Environment (build 17.0.9+0--11185874)
    • All Android licenses accepted.

[√] Android Studio (version 2023.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.9+0--11185874)

[√] VS Code (version 1.93.1)
    • VS Code at C:\Users\jakob\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.86.0

[√] Connected device (1 available)
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 14 (API 34) (emulator)

[√] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>