[Android] VoiceOver on Toolbar Item (#29596)

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### Issues Fixed

Fixes #29573
Fixes #23623

Author: kubaflo

src/Controls/src/Core/Platform/Android/Extensions/ToolbarExtensions.cs

@@ -11,6 +11,8 @@
 using Android.Views;
 using AndroidX.AppCompat.Graphics.Drawable;
 using AndroidX.AppCompat.Widget;
+using AndroidX.Core.View;
+using AndroidX.Core.View.Accessibility;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Primitives;
 using AGraphics = Android.Graphics;
@@ -399,6 +401,56 @@ static void UpdateMenuItem(AToolbar toolbar,
 						textView.SetTextColor(tintColor.MultiplyAlpha(0.302f).ToPlatform());
 				}
 			}
+
+			SetSemanticProperties(item, toolbar.FindViewById(menuitem.ItemId));
+		}
+
+		static void SetSemanticProperties(ToolbarItem menuItem, AView? view)
+		{
+			if (view == null)
+				return;
+
+			var semantics = SemanticProperties.UpdateSemantics(menuItem, null);
+			var desc = semantics?.Description;
+			var hint = semantics?.Hint;
+
+			// Only apply delegate if we have meaningful accessibility information
+			if (!string.IsNullOrWhiteSpace(desc) || !string.IsNullOrWhiteSpace(hint))
+			{
+				view.ImportantForAccessibility = ImportantForAccessibility.Yes;
+				ViewCompat.SetAccessibilityDelegate(view, new AccessibilityDelegateCompatImpl(desc, hint));
+			}
+			else
+			{
+				// Remove any previously set delegate if no accessibility info is present
+				ViewCompat.SetAccessibilityDelegate(view, null);
+			}
+		}
+
+		class AccessibilityDelegateCompatImpl : AccessibilityDelegateCompat
+		{
+			private readonly string? _desc;
+			private readonly string? _hint;
+
+			public AccessibilityDelegateCompatImpl(string? desc, string? hint)
+			{
+				_desc = desc;
+				_hint = hint;
+			}
+
+			public override void OnInitializeAccessibilityNodeInfo(AView? host, AccessibilityNodeInfoCompat? info)
+			{
+				base.OnInitializeAccessibilityNodeInfo(host, info);
+
+				if (host == null || info == null)
+					return;
+
+				if (!string.IsNullOrWhiteSpace(_desc))
+					info.ContentDescription = _desc;
+
+				if (!string.IsNullOrWhiteSpace(_hint))
+					info.HintText = _hint;
+			}
 		}
 
 		internal static void UpdateMenuItemIcon(this IMauiContext mauiContext, IMenuItem menuItem, ToolbarItem toolBarItem, Color? tintColor)