Fixed AspectRatio on ImageCropper not updating when image is loaded or resized

Author: Arlodotexe

Microsoft.Toolkit.Uwp.UI.Controls.Media/ImageCropper/ImageCropper.Events.cs

@@ -173,6 +173,7 @@ private void ImageCanvas_SizeChanged(object sender, SizeChangedEventArgs e)
 
             UpdateImageLayout();
             UpdateMaskArea();
+            UpdateAspectRatio(true);
         }
     }
 }