Clean up duplicate path normalization code in HybridWebView (#30873)

Author: jsuarezruiz

src/Core/src/Platform/Android/MauiHybridWebViewClient.cs

@@ -11,6 +11,7 @@
 using System.Web;
 using Android.Webkit;
 using Microsoft.Extensions.Logging;
+using Microsoft.Maui.Storage;
 using AWebView = Android.Webkit.WebView;
 
 namespace Microsoft.Maui.Platform
@@ -112,7 +113,7 @@ public MauiHybridWebViewClient(HybridWebViewHandler handler)
 				return null;
 			}
 
-			filename = PathUtils.NormalizePath(filename);
+			filename = FileSystemUtils.NormalizePath(filename);
 
 			try
 			{
@@ -123,15 +124,7 @@ public MauiHybridWebViewClient(HybridWebViewHandler handler)
 				return null;
 			}
 		}
-
-		internal static class PathUtils
-		{
-			public static string NormalizePath(string filename) =>
-				filename
-					.Replace('\\', Path.DirectorySeparatorChar)
-					.Replace('/', Path.DirectorySeparatorChar);
-		}
-
+		
 		private protected static IDictionary<string, string> GetHeaders(string contentType) =>
 			new Dictionary<string, string> {
 				{ "Content-Type", contentType },