Enable tray icon creation in all circumstances when running as an admin (#19382)

* Fix trayicon unable to create

* Revert "Fix trayicon unable to create"

This reverts commit 4f397dbcdf.

* Fix trayicon unable to create

* Use ChangeWindowMessageFilterEx  in Win32Platform.CreateMessageWindow

* modify the format

* Change the enum from ChangeWindowMessageFilterEx

* Change the enum from ChangeWindowMessageFilterEx

src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs

@@ -1502,6 +1502,21 @@ namespace Avalonia.Win32.Interop
         [DllImport("shell32", CharSet = CharSet.Auto)]
         public static extern int Shell_NotifyIcon(NIM dwMessage, NOTIFYICONDATA lpData);
 
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool ChangeWindowMessageFilterEx(
+            IntPtr hWnd,
+            uint message,
+            MessageFilterFlag action,
+            IntPtr pChangeFilterStruct
+        );
+
+        public enum MessageFilterFlag
+        {
+            MSGFLT_RESET = 0,
+            MSGFLT_ALLOW = 1,
+            MSGFLT_DISALLOW = 2,
+        }
+
         [DllImport("shell32", CharSet = CharSet.Auto)]
         public static extern nint SHAppBarMessage(AppBarMessage dwMessage, ref APPBARDATA lpData);
 

src/Windows/Avalonia.Win32/TrayIconImpl.cs

@@ -37,7 +37,12 @@ namespace Avalonia.Win32
                 new PixelSize(32, 32), new Vector(96, 96), PixelFormats.Bgra8888, AlphaFormat.Unpremul);
             s_emptyIcon = new Win32Icon(bitmap);
         }
-        
+
+        internal static void ChangeWindowMessageFilter(IntPtr hWnd)
+        {
+            ChangeWindowMessageFilterEx(hWnd, WM_TASKBARCREATED, MessageFilterFlag.MSGFLT_ALLOW, IntPtr.Zero);
+        }
+
         public TrayIconImpl()
         {
             FindTaskBarMonitor();

src/Windows/Avalonia.Win32/Win32Platform.cs

@@ -218,6 +218,8 @@ namespace Avalonia.Win32
             {
                 throw new Win32Exception();
             }
+
+            TrayIconImpl.ChangeWindowMessageFilter(_hwnd);
         }
 
         public ITrayIconImpl CreateTrayIcon()