Repository: flutter
Issue: Read-only TextField prevents focus from changing
Labels: a: text input,framework,f: focus,has reproducible steps,P2,workaround available,team-text-input,triaged-text-input,found in release: 3.27,found in release: 3.28

### Steps to reproduce

* Build the application for MacOS. 
* Press tab three times.

### Expected results

The focus should be on the 3rd textfield. 

### Actual results

The focus is still on the 2nd textfield which is `readOnly`.

### Code sample

<details open><summary>Code sample</summary>

```dart
void main() => runApp(const Foo());

class Foo extends StatelessWidget {
  const Foo({super.key});

  @override
  Widget build(BuildContext context) => const MaterialApp(
    home: Scaffold(
      body: Column(
        children: [
          TextField(),
          TextField(readOnly: true),
          TextField(),
        ],
      ),
    ),
  );
}
```

</details>


### Screenshots or Video

_No response_

### Logs

_No response_

### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
[✓] Flutter (Channel stable, 3.27.1, on macOS 15.2 24C101 darwin-arm64, locale en-SG)
    • Flutter version 3.27.1 on channel stable at /Users/matthias/Documents/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 17025dd882 (4 weeks ago), 2024-12-17 03:23:09 +0900
    • Engine revision cb4b5fff73
    • Dart version 3.6.0
    • DevTools version 2.40.2

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/matthias/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Users/matthias/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 21.0.4+-12422083-b607.1)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16C5032a
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2)
    • Android Studio at /Users/matthias/Applications/Android Studio.app/Contents
    • 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 21.0.4+-12422083-b607.1)

[✓] IntelliJ IDEA Ultimate Edition (version 2024.3.1.1)
    • IntelliJ at /Users/matthias/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 83.0.4
    • Dart plugin version 243.23177

[✓] Connected device (4 available)
    • Overpriced Phone (mobile)       • 00008030-0009195E1E41802E • ios            • iOS 18.1.1 22B91
    • macOS (desktop)                 • macos                     • darwin-arm64   • macOS 15.2 24C101 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad     • darwin         • macOS 15.2 24C101 darwin-arm64
    • Chrome (web)                    • chrome                    • web-javascript • Google Chrome 131.0.6778.265

[✓] Network resources
    • All expected network resources are available.
```

</details>