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/notification/ZenAccessSettings.java

@@ -77,9 +77,6 @@ public class ZenAccessSettings extends EmptyTextSettings {
         mContext = getActivity();
         mPkgMan = mContext.getPackageManager();
         mNoMan = mContext.getSystemService(NotificationManager.class);
-        if (!usePreferenceScreenTitle()) {
-            setPreferenceScreen(getPreferenceManager().createPreferenceScreen(mContext));
-        }
     }
 
     @Override