Repository: flutter
Issue: [local_auth][Android] getAvailableBiometrics returns empty on some devices when face unlock is enabled without fingerprint
Labels: platform-android,p: local_auth,package,dependency: android,P2,team-android,triaged-android

## Steps to Reproduce

1. Have a device supporting face (weak) and fingerprint (strong) for security checks.
2. Disable fingerprint in the device's options and leave the face recognition enabled for app authentication and phone unlock.
3. Call `await LocalAuthentication().getAvailableBiometrics();`
4. Check the result where the list of available biometrics is empty.

NOTE: if the fingerprint is enabled in the phone settings, the result contains a list of both types: `BiometricType.weak` & `BiometricType.strong`. The devices I tested this on were Samsung Galaxy A8 2018, Pixel 7 Pro, Samsung Galaxy Note20, Xiaomi 11 Lite - all of them had this issue reproducible.

**Expected results:**
The result contains weak or other indication of having face recognition as a biometric possibility (when enrolled).

**Actual results:** 
The result is empty.

<details>
<summary>Code sample</summary>

```
void main() {
  final availableBiometrics = await LocalAuthentication().getAvailableBiometrics();

  BiometricType? biometricTypeForLogin;
  if (availableBiometrics.isNotEmpty) {
    // If device has strong use strong otherwise use weak. If null
    // do not show the option.
    if(availableBiometrics.contains(BiometricType.strong)) {
      biometricTypeForLogin = BiometricType.strong;
    } else if(availableBiometrics.contains(BiometricType.weak)) {
      biometricTypeForLogin = BiometricType.weak;
    }
  }
}
```
</details>

<details>
<summary>Flutter doctor</summary>

```

[√] Flutter (Channel stable, 2.10.5, on Microsoft Windows [Version 10.0.22000.1219], locale en-150)
    • Flutter version 2.10.5 at <path here>
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 5464c5bac7 (8 months ago), 2022-04-18 09:55:37 -0700
    • Engine revision 57d3bac3dd
    • Dart version 2.16.2
    • DevTools version 2.9.2

[√] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at <path here>
    • Platform android-33, build-tools 33.0.0
    • Java binary at: <path here>
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at <path here>

[!] Visual Studio - develop for Windows (Visual Studio Community 2022 17.1.5)
    • Visual Studio at <path here>
    • Visual Studio Community 2022 version 17.1.32414.318
    X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C++" workload, and include these components:
        MSVC v142 - VS 2019 C++ x64/x86 build tools
         - If there are multiple build tool versions available, install the latest
        C++ CMake tools for Windows
        Windows 10 SDK

[√] Android Studio (version 2021.3)
    • Android Studio at <path here>
    • 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)

[√] IntelliJ IDEA Ultimate Edition (version 2021.2)
    • IntelliJ at <path here>
    • 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

[√] VS Code (version 1.71.0)
    • VS Code at <path here>
    • Flutter extension version 3.48.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.22000.1219]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 108.0.5359.124
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 108.0.1462.54

[√] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 1 category.

```

</details>