Repository: flutter
Issue: [platform-ios]:  Cannot delete emojis from textfield if they are input using emoji keyboard.The focus remains on both textfields (TextField widget and Emoji search)
Labels: a: text input,platform-ios,framework,engine,f: material design,a: typography,has reproducible steps,P2,found in release: 2.11,found in release: 2.13,team-ios,triaged-ios

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## Steps to Reproduce

<!-- Please include full steps to reproduce so that we can reproduce the problem. -->

1. Execute `flutter run` on the code sample <!-- (see "Code sample" section below) -->
2. focus on `textfield`
3. type on searching emoji input
4. tap `textfield` again

**Expected results:** <!-- what did you want to see? -->
after tap `textfield`, unfocus on searching emoji input and focus on `textfield` like native below

https://user-images.githubusercontent.com/52235899/158925057-143c4626-6ef3-44b2-b19f-32780bb547da.mov



**Actual results:** <!-- what did you see? -->
nothing happen. (can't unfocus)

https://user-images.githubusercontent.com/52235899/158925108-5cde4592-280a-4a80-a5c7-7f0db0b8da59.mov


<details>
<summary>Code sample</summary>

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```dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: _MyHomePage(),
    );
  }
}

class _MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: Center(
        child: TextField(),
      ),
    );
  }
}


```

</details>

<details>
  <summary>Logs</summary>

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      log output below between the lines with the backticks. If there is an
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```
```

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     Run `flutter analyze` and attach any output of that command below.
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```
No issues found! (ran in 4.2s)
```

<!-- Finally, paste the output of running `flutter doctor -v` here. -->

```
[✓] Flutter (Channel stable, 2.10.0, on macOS 12.3 21E230 darwin-x64, locale en-US)
    • Flutter version 2.10.0 at /Users/takashi/fvm/versions/2.10.0
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 5f105a6ca7 (6 weeks ago), 2022-02-01 14:15:42 -0800
    • Engine revision 776efd2034
    • Dart version 2.16.0
    • DevTools version 2.9.2

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/takashi/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • ANDROID_HOME = /Users/takashi/Library/Android
    • ANDROID_SDK_ROOT = /Users/takashi/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.2)
    • 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 11.0.8+10-b944.6916264)

[✓] VS Code (version 1.65.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.36.0

[✓] Connected device (1 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 99.0.4844.74
    ! Error: TAKASHI is not connected. Xcode will continue when TAKASHI is connected. (code -13)

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!
```

</details>


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