feat(flutter): 接入 flutter_native_splash 原生开屏

android/app/src/main/res/values-night-v31/styles.xml

@@ -5,6 +5,6 @@
     <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <item name="android:windowBackground">@drawable/launch_background</item>
         <item name="android:windowSplashScreenBackground">@color/splash_background</item>
-        <item name="android:windowSplashScreenAnimatedIcon">@drawable/splash_transparent</item>
+        <item name="android:windowSplashScreenAnimatedIcon">@android:color/transparent</item>
     </style>
 </resources>