Try to fix icon size for web

flutter/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-  <background android:drawable="@color/ic_launcher_background"/>
+  <background android:drawable="@color/ic_launcher_background" />
   <foreground>
       <inset
           android:drawable="@drawable/ic_launcher_foreground"
-          android:inset="21%" />
+          android:inset="16%" />
   </foreground>
   <monochrome>
       <inset
           android:drawable="@drawable/ic_launcher_monochrome"
-          android:inset="21%" />
+          android:inset="16%" />
   </monochrome>
 </adaptive-icon>

flutter/flutter_launcher_icons.yaml

@@ -6,7 +6,6 @@ flutter_launcher_icons:
   adaptive_icon_background: "#000000"
   adaptive_icon_foreground: "assets/app_icon/white_trans.png"
   adaptive_icon_monochrome: "assets/app_icon/white_black.png"
-  adaptive_icon_foreground_inset: 21
 
   ios: true
   remove_alpha_ios: true