Update Avalonia.Android version management in csproj

The `Avalonia.Android` package reference in the `CodeBreaker.Avalonia.Android.csproj` file has been updated. Instead of hardcoding the version to `11.0.9`, it now uses the `AvaloniaVersion` variable.

Author: szv

src/CodeBreaker.Avalonia/CodeBreaker.Avalonia.Android/CodeBreaker.Avalonia.Android.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia.Android" Version="11.0.9" />
+    <PackageReference Include="Avalonia.Android" Version="$(AvaloniaVersion)" />
     <PackageReference Include="Xamarin.AndroidX.Core.SplashScreen" Version="1.0.1.5" />
   </ItemGroup>