Remove the feature flag for using new title.

- remove all code that check for the feature flag, and use the new logic
by default.

Change-Id: I7fbe60da84c1c0f35e7241402a71d2bc4cd300e6
Fixes: 64564191
Test: make RunSettingsRoboTests

src/com/android/settings/accessibility/AccessibilityShortcutPreferenceFragment.java

@@ -59,9 +59,6 @@ public class AccessibilityShortcutPreferenceFragment extends ToggleFeaturePrefer
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        if (!usePreferenceScreenTitle()) {
-            addPreferencesFromResource(R.xml.accessibility_shortcut_settings);
-        }
         mServicePreference = findPreference(SHORTCUT_SERVICE_KEY);
         mOnLockScreenSwitchPreference = (SwitchPreference) findPreference(ON_LOCK_SCREEN_KEY);
         mOnLockScreenSwitchPreference.setOnPreferenceChangeListener((Preference p, Object o) -> {