Fix MauiIcon ForegroundScale on systems with comma as decimal separat…

…or (#11690)

### Description of Change

Specifying the `ForegroundScale` with a dot caused an issue on systems
with commas as decimal separators. The image got upscaled instead of
downscaled on those systems because the `ForegroundScale` was parsed
without passing `InvariantCulture` as culture info. Because of this, the
existing implementation only worked on systems with a dot as a decimal
separator.

In order to solve the issue, the InvariantCulture get's now used when
parsing `ForegroundScale`

Fixes #11685

src/SingleProject/Resizetizer/src/ResizeImageInfo.cs

@@ -1,6 +1,7 @@
 #nullable enable
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using Microsoft.Build.Framework;
 using SkiaSharp;
@@ -95,7 +96,7 @@ public static List<ResizeImageInfo> Parse(IEnumerable<ITaskItem> images)
  if (bool.TryParse(image.GetMetadata("IsAppIcon"), out var iai))
  info.IsAppIcon = iai;
 
- if (float.TryParse(image.GetMetadata("ForegroundScale"), out var fsc))
+ if (float.TryParse(image.GetMetadata("ForegroundScale"), NumberStyles.Number, CultureInfo.InvariantCulture, out var fsc))
  info.ForegroundScale = fsc;
 
  var fgFile = image.GetMetadata("ForegroundFile");