For #18481: waits for url to be visible in TestHelper.verifyUrl() (#18498)

app/src/androidTest/java/org/mozilla/fenix/helpers/TestHelper.kt

@@ -28,6 +28,7 @@ import kotlinx.coroutines.runBlocking
 import org.hamcrest.CoreMatchers
 import org.hamcrest.CoreMatchers.allOf
 import org.mozilla.fenix.R
+import org.mozilla.fenix.helpers.TestAssetHelper.waitingTime
 import org.mozilla.fenix.helpers.ext.waitNotNull
 import org.mozilla.fenix.helpers.idlingresource.NetworkConnectionIdlingResource
 import org.mozilla.fenix.ui.robots.mDevice
@@ -88,6 +89,7 @@ object TestHelper {
 
     fun verifyUrl(urlSubstring: String, resourceName: String, resId: Int) {
         waitUntilObjectIsFound(resourceName)
+        mDevice.findObject(UiSelector().text(urlSubstring)).waitForExists(waitingTime)
         onView(withId(resId)).check(ViewAssertions.matches(withText(CoreMatchers.containsString(urlSubstring))))
     }