[fenix] For https://github.com/mozilla-mobile/fenix/issues/25852: Fixes visibility issue of private tabs notification in UI tests

app/src/androidTest/java/org/mozilla/fenix/ui/robots/NotificationRobot.kt

@@ -65,8 +65,8 @@ class NotificationRobot {
     }
 
     fun verifyPrivateTabsNotification() {
-        mDevice.waitNotNull(Until.hasObject(text("Close private tabs")), waitingTime)
+        verifySystemNotificationExists("$appName (Private)")
-        assertPrivateTabsNotification()
+        verifySystemNotificationExists("Close private tabs")
     }
 
     fun clickMediaNotificationControlButton(action: String) {
@@ -115,7 +115,14 @@ class NotificationRobot {
     class Transition {
 
         fun clickClosePrivateTabsNotification(interact: HomeScreenRobot.() -> Unit): HomeScreenRobot.Transition {
-            NotificationRobot().verifySystemNotificationExists("Close private tabs")
+            try {
+                assertTrue(
+                    closePrivateTabsNotification().exists()
+                )
+            } catch (e: AssertionError) {
+                notificationTray().flingToEnd(1)
+            }
+
             closePrivateTabsNotification().click()
 
             HomeScreenRobot().interact()
@@ -129,11 +136,6 @@ fun notificationShade(interact: NotificationRobot.() -> Unit): NotificationRobot
     return NotificationRobot.Transition()
 }
 
-private fun assertPrivateTabsNotification() {
-    mDevice.findObject(UiSelector().text("Firefox Preview (Private)")).exists()
-    mDevice.findObject(UiSelector().text("Close private tabs")).exists()
-}
-
 private fun closePrivateTabsNotification() =
     mDevice.findObject(UiSelector().text("Close private tabs"))