[BUG] background color inconsistent on android 12

### :information_source: Info

Version: `v0.9.2`

### :speech_balloon: Description

icon background inconsistent on android 12
to reproduce the issue:

- clone this [repository](https://github.com/aoatmon/icon_background_issue)
- run `flutter pub run flutter_launcher_icons:main`
- run `flutter run --release` on **_android 12 device_** (tested device in the doctor below)

observe inconsistent icon background

in pubspec `#000000`
in launcher `#ffffff`
minimized `"blue"`

### :scroll: Pubspec.yaml

pubspec

```yaml
name: icon_background_issue
description:
publish_to: 'none'
version: 1.0.0+1

environment:
sdk: '>=2.14.4 <3.0.0'
flutter: ^2.5.3

dependencies:
flutter:
sdk: flutter

dev_dependencies:
flutter_lints: ^1.0.0
flutter_launcher_icons: ^0.9.2

flutter:
uses-material-design: true
assets:
- images/

flutter_icons:
android: true
image_path: images/dash.png
adaptive_icon_background: '#000000'
```

doctor

```console
[✓] Flutter (Channel stable, 2.5.3, on macOS 12.0.1 21A559 darwin-x64, locale en-EE)
• Flutter version 2.5.3 at /Users/francesco/fvm/versions/stable
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 18116933e7 (8 weeks ago), 2021-10-15 10:46:35 -0700
• Engine revision d3ea636dc5
• Dart version 2.14.4

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/francesco/Library/Android/sdk
• Platform android-31, build-tools 30.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 13.1, Build version 13A1030d
• CocoaPods version 1.11.2

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2020.3)
• 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 11.0.10+0-b96-7281165)

[✓] VS Code (version 1.62.3)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.29.0

[✓] Connected device (3 available)
• Pixel 3a (mobile) • 965AY0WP5C • android-arm64 • Android 12 (API 31)
• macOS (desktop) • macos • darwin-x64 • macOS 12.0.1 21A559 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 96.0.4664.55

• No issues found!
```

screenshots


related issue https://github.com/fluttercommunity/flutter_launcher_icons/issues/302

cc @MarkOSullivan94