Added comment in test sample

Author: Dhivya-SF4094

src/Controls/samples/Controls.Sample.Sandbox/MainPage.xaml.cs

@@ -1,20 +1,9 @@
-using System.Collections.ObjectModel;
-
-namespace Maui.Controls.Sample;
+namespace Maui.Controls.Sample;
 
 public partial class MainPage : ContentPage
 {
 	public MainPage()
 	{
 		InitializeComponent();
 	}
-}
-public class CollectionViewViewModel
-{
-	public ObservableCollection<string> ItemList { get; set; }
-
-	public CollectionViewViewModel()
-	{
-		ItemList = new ObservableCollection<string>();
-	}
 }

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28604.cs

@@ -1,4 +1,4 @@
-#if IOS || MACCATALYST
+#if !ANDROID // this test case is ignored in android, as it has incositent scrolling behavior while using emptyView as string.  https://github.com/dotnet/maui/issues/28765 
 using NUnit.Framework;
 using UITest.Appium;
 using UITest.Core;