[macOS] App crashes in Khmer layout

[dkwingsmt]

Certain keys in Khmer keyboard layout crashes the app.

Reproduction:

1. Run flutter run -d macOS in an app that contains a text field
2. Switch to macOS Khmer keyboard
3. Press 2

Expected result: The text field has text "2"

Actual result: The app crashes with the following log:

[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: 'package:flutter/src/services/hardware_keyboard.dart': Failed assertion: line 798 pos 16: 'data.physical != 0 && data.logical != 0': is not true.
#0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61)
#1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5)
#2      KeyEventManager.handleKeyData (package:flutter/src/services/hardware_keyboard.dart:798:16)
#3      PlatformDispatcher._keyDataListener.<anonymous closure>.<anonymous closure> (dart:ui/platform_dispatcher.dart:408:41)
#4      _invoke1 (dart:ui/hooks.dart:165:13)
#5      PlatformDispatcher._keyDataListener.<anonymous closure> (dart:ui/platform_dispatcher.dart:406:7)
#6      _invoke2 (dart:ui/hooks.dart:184:13)
#7      _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:40:5)
#8      _Channel.push (dart:ui/channel_buffers.dart:130:31)
#9      ChannelBuffers.push (dart:ui/channel_buffers.dart:327:17)
#10     PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:605:22)
#11     _dispatchPlatformMessage (dart:ui/hooks.dart:87:31)

[✓] Flutter (Channel master, 3.1.0-0.0.pre.2009, on macOS 12.5 21G72 darwin-x64, locale en-US)
    • Flutter version 3.1.0-0.0.pre.2009 on channel master at /Users/tongmu/dev/flutter
    • Upstream repository [email protected]:flutter/flutter.git
    • Framework revision 9d96c7b8be (7 hours ago), 2022-08-01 00:39:06 -0400
    • Engine revision cf0db3e546
    • Dart version 2.19.0 (build 2.19.0-49.0.dev)
    • DevTools version 2.16.0
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)

• Android SDK at /Users/tongmu/Library/Android/sdk

✗ cmdline-tools component is missing

Run path/to/sdkmanager --install "cmdline-tools;latest"

See https://developer.android.com/studio/command-line for more details.

✗ Android license status unknown.

Run flutter doctor --android-licenses to accept the SDK licenses.

See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
[✓] Xcode - develop for iOS and macOS (Xcode 13.3.1)

• Xcode at /Applications/Xcode.app/Contents/Developer

• Build 13E500a

• CocoaPods version 1.11.2
[✓] Chrome - develop for the web

• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio

• Android Studio at /Applications/Android Studio with Blaze Beta.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 11.0.13+0-b1751.21-8125866)
[✓] Android Studio (version 3.3)

• 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 1.8.0_152-release-1248-b01)
[✓] VS Code (version 1.69.2)

• VS Code at /Applications/Visual Studio Code.app/Contents

• Flutter extension version 3.44.0
[✓] Connected device (2 available)

• macOS (desktop) • macos  • darwin-x64     • macOS 12.5 21G72 darwin-x64

• Chrome (web)    • chrome • web-javascript • Google Chrome 103.0.5060.134
[✓] HTTP Host Availability

• All required HTTP hosts are available
! Doctor found issues in 1 category.

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