For #27522 new undo delete search engine UI test

app/src/androidTest/java/org/mozilla/fenix/ui/SettingsSearchTest.kt

@@ -312,4 +312,19 @@ class SettingsSearchTest {
             verifyClipboardSuggestionsAreDisplayed(link, false)
         }
     }
+
+    // Expected for en-us defaults
+    @Test
+    fun undoDeleteSearchEngineTest() {
+        homeScreen {
+        }.openThreeDotMenu {
+        }.openSettings {
+        }.openSearchSubMenu {
+            verifyEngineListContains("Bing")
+            openEngineOverflowMenu("Bing")
+            clickDeleteSearchEngine()
+            clickUndoSnackBarButton()
+            verifyEngineListContains("Bing")
+        }
+    }
 }

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

@@ -249,6 +249,17 @@ class SettingsSubMenuSearchRobot {
 
     fun clickEdit() = onView(withText("Edit")).click()
 
+    fun clickDeleteSearchEngine() =
+        mDevice.findObject(
+            UiSelector().textContains(getStringResource(R.string.search_engine_delete)),
+        ).click()
+
+    fun clickUndoSnackBarButton() =
+        mDevice.findObject(
+            UiSelector()
+                .resourceId("$packageName:id/snackbar_btn"),
+        ).click()
+
     fun saveEditSearchEngine() {
         onView(withId(R.id.save_button)).click()
         assertTrue(