Flutter适配安卓刘海、水滴屏显示全屏

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- Theme applied to the Android Window while the process is starting -->
    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
        <!-- Show a splash screen on the activity. Automatically removed when
             Flutter draws its first frame -->
        <item name="android:windowBackground">@drawable/launch_background</item>
        /// 放这里
        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
    </style>
    <!-- Theme applied to the Android Window as soon as the process has started.
         This theme determines the color of the Android Window while your
         Flutter UI initializes, as well as behind your Flutter UI while its
         running.
         
         This Theme is only used starting with V2 of Flutter's Android embedding. -->
    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
        <item name="android:windowBackground">@android:color/white</item>
        /// 放这里
        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
    </style>
</resources>

@override
initState() {
    /// 初始化时隐藏
      SystemChrome.setEnabledSystemUIOverlays([]);
      super.initState();
}

@override
void dispose() { 
  /// 页面关闭时恢复正常设置
    SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values);
    super.dispose();
}