[Android] Fix for SearchHandler Placeholder did not update when changed at runtime (#28636)

* Placeholder issue fix

* Added Android snapshot

* Added Mac and Windows snapshots

Author: Tamilarasan-Paranthaman

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/SearchHandlerAppearanceTracker.cs

@@ -54,6 +54,10 @@ protected virtual void SearchHandlerPropertyChanged(object sender, System.Compon
 			{
 				UpdateTextTransform();
 			}
+			else if (e.Is(SearchHandler.PlaceholderProperty))
+			{
+				UpdatePlaceholder();
+			}
 			else if (e.Is(SearchHandler.PlaceholderColorProperty))
 			{
 				UpdatePlaceholderColor();
@@ -137,6 +141,11 @@ void UpdateFont()
 			_editText.SetTextSize(ComplexUnitType.Sp, (float)_searchHandler.FontSize);
 		}
 
+		void UpdatePlaceholder()
+		{
+			_editText.Hint = _searchHandler.Placeholder;
+		}
+
 		void UpdatePlaceholderColor()
 		{
 			_editText.UpdatePlaceholderColor(_searchHandler.PlaceholderColor);

src/Controls/tests/TestCases.Android.Tests/snapshots/android/VerifySearchHandlerPlaceholderText.png

@@ -0,0 +1,49 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 28634, "[Android] SearchHandler Placeholder Text", PlatformAffected.Android)]
+public class Issue28634 : TestShell
+{
+
+	protected override void Init()
+	{
+		this.FlyoutBehavior = FlyoutBehavior.Flyout;
+
+		var shellContent = new ShellContent
+		{
+			Title = "Home",
+			Route = "MainPage",
+			Content = new Issue28634ContentPage() { Title = "Home" }
+		};
+
+		Items.Add(shellContent);
+
+	}
+	class Issue28634ContentPage : ContentPage
+	{
+		public Issue28634ContentPage()
+		{
+
+			var searchHandler = new SearchHandler
+			{
+				Placeholder = "Type a fruit name to search",
+				PlaceholderColor = Colors.Red,
+			};
+
+			var button = new Button
+			{
+				Text = "Change SearchHandler Placeholder",
+				AutomationId = "button",
+				HorizontalOptions = LayoutOptions.Center,
+				VerticalOptions = LayoutOptions.Center,
+			};
+			button.Clicked += (s, e) =>
+			{
+				searchHandler.Placeholder = "Type a vegetable name to search";
+			};
+
+			Shell.SetSearchHandler(this, searchHandler);
+
+			Content = button;
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue28634.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue28634 : _IssuesUITest
+{
+	public override string Issue => "[Android] SearchHandler Placeholder Text";
+
+	public Issue28634(TestDevice device)
+	: base(device)
+	{ }
+
+	[Test]
+	[Category(UITestCategories.Shell)]
+	public void VerifySearchHandlerPlaceholderText()
+	{
+		App.WaitForElement("button");
+		App.Tap("button");
+		VerifyScreenshot();
+	}
+}