Upgrade Avalonia packages and fixed some of issues with this upgrade.

Progrart.Android/Application.cs

@@ -0,0 +1,22 @@
+using Android.App;
+using Android.Runtime;
+using Avalonia;
+using Avalonia.Android;
+using Progrart;
+
+namespace Progrart.Android
+{
+	[Application]
+	public class Application : AvaloniaAndroidApplication<App>
+	{
+		protected Application(nint javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
+		{
+		}
+
+		protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
+		{
+			return base.CustomizeAppBuilder(builder)
+			.WithInterFont();
+		}
+	}
+}

Progrart.Android/MainActivity.cs

@@ -12,11 +12,12 @@ namespace Progrart.Android;
     RoundIcon = "@drawable/app_icon",
     MainLauncher = true,
     ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
-public class MainActivity : AvaloniaMainActivity<App>
+//public class MainActivity : AvaloniaMainActivity<App>
+public class MainActivity : AvaloniaMainActivity//<App>
 {
-    protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
-    {
-        return base.CustomizeAppBuilder(builder)
-            .WithInterFont();
-    }
+    //protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
+    //{
+    //    return base.CustomizeAppBuilder(builder)
+    //        .WithInterFont();
+    //}
 }