Fixed FontImageSource icon color does not change in the TabbedPage wh…

…en dynamically updated. (dotnet#27742)

* Fixed The FontImageSource icon color does not change in the TabbedPage when dynamically updated.

* Updated code changes

src/Controls/src/Core/Page/Page.cs

@@ -65,7 +65,7 @@ public partial class Page : VisualElement, ILayout, IPageController, IElementCon
 		public static readonly BindableProperty TitleProperty = BindableProperty.Create(nameof(Title), typeof(string), typeof(Page), null);
 
 		/// <summary>Bindable property for <see cref="IconImageSource"/>.</summary>
-		public static readonly BindableProperty IconImageSourceProperty = BindableProperty.Create(nameof(IconImageSource), typeof(ImageSource), typeof(Page), default(ImageSource));
+		public static readonly BindableProperty IconImageSourceProperty = BindableProperty.Create(nameof(IconImageSource), typeof(ImageSource), typeof(Page), default(ImageSource), propertyChanged: OnImageSourceChanged);
 
 		readonly Lazy<PlatformConfigurationRegistry<Page>> _platformConfigurationRegistry;
 
@@ -902,6 +902,20 @@ internal void SendNavigatedFrom(NavigatedFromEventArgs args, bool disconnectHand
 			}
 		}
 
+		static void OnImageSourceChanged(BindableObject bindable, object oldvalue, object newValue)
+		{
+			if (oldvalue is ImageSource oldImageSource)
+				oldImageSource.SourceChanged -= ((Page)bindable).OnImageSourceSourceChanged;
+
+			if (newValue is ImageSource newImageSource)
+				newImageSource.SourceChanged += ((Page)bindable).OnImageSourceSourceChanged;
+		}
+
+		void OnImageSourceSourceChanged(object sender, EventArgs e)
+		{
+			OnPropertyChanged(IconImageSourceProperty.PropertyName);
+		}
+
 		/// <summary>
 		/// Raised after the page was navigated to.
 		/// </summary>