feat: icon.

demo/Ursa.Demo.Android/MainActivity.cs

@@ -1,20 +1,17 @@
 using Android.App;
 using Android.Content.PM;
-using Avalonia;
 using Avalonia.Android;
 
 namespace Ursa.Demo.Android;
 
 [Activity(
-    Label = "Ursa.Demo.Android",
+    Label = "Ursa",
     Theme = "@style/MyTheme.NoActionBar",
     Icon = "@drawable/icon",
     MainLauncher = true,
+    LaunchMode = LaunchMode.SingleTop, 
     ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
 public class MainActivity : AvaloniaMainActivity<App>
 {
-    protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
-    {
-        return base.CustomizeAppBuilder(builder);
-    }
+
 }