fix for flaky tests (#30088)

Author: anandhan-rajagopal

src/Controls/tests/TestCases.Shared.Tests/Tests/DragAndDropUITests.cs

@@ -161,6 +161,9 @@ public void PlatformDragEventArgs()
 			App.WaitForElement("LabelDragElement");
 			App.DragAndDrop("LabelDragElement", "DragTarget");
 
+			// Add an additional drag and drop to avoid the flakiness in CI.
+			App.DragAndDrop("LabelDragElement", "DragTarget");
+
 			App.WaitForElement("DragStartEventsLabel");
 			var textAfterDragStart = App.FindElement("DragStartEventsLabel").GetText();
 

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue8870.cs

@@ -20,26 +20,26 @@ public Issue8870(TestDevice testDevice) : base(testDevice)
 		[Category(UITestCategories.CollectionView)]
 		[FailsOnMacWhenRunningOnXamarinUITest("SetOrientationPortrait method not implemented")]
 		[FailsOnWindowsWhenRunningOnXamarinUITest("SetOrientationPortrait method not implemented")]
-		public async Task RotatingCollectionViewWithHTMLShouldNotHangOrCrash()
+		public void RotatingCollectionViewWithHTMLShouldNotHangOrCrash()
 		{
-			int delay = 3000;
+			int delay = 1000;
 
 			App.WaitForElement(CheckResult);
 
 			App.SetOrientationPortrait();
-			await Task.Delay(delay);
+			Thread.Sleep(delay);
 
 			App.SetOrientationLandscape();
-			await Task.Delay(delay);
+			Thread.Sleep(delay);
 
 			App.SetOrientationPortrait();
-			await Task.Delay(delay);
+			Thread.Sleep(delay);
 
 			App.SetOrientationLandscape();
-			await Task.Delay(delay);
+			Thread.Sleep(delay);
 
 			App.SetOrientationPortrait();
-			await Task.Delay(delay);
+			Thread.Sleep(delay);
 
 			App.WaitForElement(CheckResult);
 			App.Tap(CheckResult);