Repository: flutter
Issue: [Autofill] Autofill is using the old value of textfield after the value was replaced by a previously saved autofill value
Labels: a: text input,platform-android,framework,has reproducible steps,P2,team-text-input,triaged-text-input,found in release: 3.24

### Steps to reproduce

1. Use the app to save some credentials.
2. Restart the app.
3. Write something manually on the password textfield.
4. Go to the email textfield and select the autofill option to use the previously saved credentials.
5. The manually written password is replaced by the password from autofill.
6. Click the login button to call the finishautofillcontext and prompt the save password dialog if needed.

### Expected results

Save credentials dialog should not show up since we are using stored credentials and both the email and password are the same as before, we are not updating the credentials.

### Actual results

The user gets the save dialog prompt. The password we are trying to save is the password we initially wrote before it got replaced by the one from the autofill.


### Code sample

<details open><summary>Code sample</summary>

```dart
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(

        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  final TextEditingController emailController = TextEditingController();
  final TextEditingController passwordController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(),
      body: AutofillGroup(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            TextField(
              controller: emailController,
              keyboardType: TextInputType.emailAddress,
              autofillHints: const [AutofillHints.email],
            ),
            TextField(
              controller: passwordController,
              autofillHints: const [AutofillHints.password],
              keyboardType: TextInputType.visiblePassword,
            ),
            ElevatedButton(
              onPressed: () {
                print("EmailControllerText: ${emailController.text}");
                print("PasswordControllerText: ${passwordController.text}");
                TextInput.finishAutofillContext();
              },
              child: Text('login'),
            )
          ],
        ),
      ),
    );
  }
}
```

</details>


### Screenshots or Video

_No response_

### Logs

_No response_

### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
[✓] Flutter (Channel stable, 3.24.0, on macOS 14.4.1 23E224 darwin-arm64, locale es-ES)
    • Flutter version 3.24.0 on channel stable at /Users/danielcastro/dev/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 80c2e84975 (2 weeks ago), 2024-07-30 23:06:49 +0700
    • Engine revision b8800d88be
    • Dart version 3.5.0
    • DevTools version 2.37.2

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
    • Android SDK at /Users/danielcastro/Library/Android/sdk
    • Platform android-35, build-tools 35.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15F31d
    • CocoaPods version 1.15.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.1)
    • Android Studio at /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 17.0.11+0-17.0.11b1207.24-11852314)

[✓] Connected device (4 available)
    • 23013PC75G (mobile)             • ffd52427              • android-arm64  • Android 14 (API 34)
    • macOS (desktop)                 • macos                 • darwin-arm64   • macOS 14.4.1 23E224 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin         • macOS 14.4.1 23E224 darwin-arm64
    • Chrome (web)                    • chrome                • web-javascript • Google Chrome 127.0.6533.100
    ! Error: Browsing on the local area network for iPhone de Daniel. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)

[✓] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>


### Notes
* The controllers show the replaced value, not the old one, so there is no issues login in in the real world, the only issue is the Autofill prompting with old credentials.
* If we focus and unfocus the textfield after it was updated, the issue does not happen.
* I have only tested this code on Android.