Fix WaitForTextToBePresentInElement to throw TimeoutException instead of returning false

Co-authored-by: jfversluis <[email protected]>

Author: Copilot

src/Plugin.Maui.UITestHelpers.Appium/HelperExtensions.cs

@@ -814,7 +814,7 @@ public static bool WaitForTextToBePresentInElement(this IApp app, string automat
                 {
                     Debug.WriteLine($">>>>> {elapsed} ticks elapsed, timeout value is {timeout.Value.Ticks}");
 
-                    return false;
+                    throw new TimeoutException($"Timed out waiting for text '{text}' to be present in element with automation id '{automationId}'.");
                 }
 
                 Task.Delay(retryFrequency.Milliseconds).Wait();