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/ToggleScreenMagnificationPreferenceFragment.java

@@ -216,8 +216,7 @@ public class ToggleScreenMagnificationPreferenceFragment extends
             mInitialSetting = arguments.getBoolean(AccessibilitySettings.EXTRA_CHECKED);
         }
 
-        if (usePreferenceScreenTitle()
-                && arguments.containsKey(AccessibilitySettings.EXTRA_TITLE_RES)) {
+        if (arguments.containsKey(AccessibilitySettings.EXTRA_TITLE_RES)) {
             final int titleRes = arguments.getInt(AccessibilitySettings.EXTRA_TITLE_RES);
             if (titleRes > 0) {
                 getActivity().setTitle(titleRes);