For #18986: re-enable changeAccessibiltySettings UI test, not failing anymore

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

@@ -161,7 +161,6 @@ class SettingsBasicsTest {
         }
     }
 
-    @Ignore("Failing, see: https://github.com/mozilla-mobile/fenix/issues/18986")
     @Test
     fun changeAccessibiltySettings() {
         // Goes through the settings and changes the default text on a webpage, then verifies if the text has changed.

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

@@ -148,15 +148,19 @@ class SettingsRobot {
         }
 
         fun openAccessibilitySubMenu(interact: SettingsSubMenuAccessibilityRobot.() -> Unit): SettingsSubMenuAccessibilityRobot.Transition {
+            scrollToElementByText("Accessibility")
 
             fun accessibilityButton() = onView(withText("Accessibility"))
-            accessibilityButton().click()
+            accessibilityButton()
+                .check(matches(isDisplayed()))
+                .click()
 
             SettingsSubMenuAccessibilityRobot().interact()
             return SettingsSubMenuAccessibilityRobot.Transition()
         }
 
         fun openLanguageSubMenu(interact: SettingsSubMenuLanguageRobot.() -> Unit): SettingsSubMenuLanguageRobot.Transition {
+            scrollToElementByText("Language")
 
             fun languageButton() = onView(withText("Language"))
             languageButton().click()