Fix when adjusting the display size, the font size flashes.

Action:
By super to access the parent function to save the highlighted state of the preference.

Bug: 250800752
Test: manual test
Change-Id: Idca9a4f31910638c19f26ff01136530d17677055

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

@@ -210,6 +210,8 @@ public class TextReadingPreferenceFragment extends DashboardFragment {
 
     @Override
     public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+
         if (mNeedResetSettings) {
             outState.putBoolean(NEED_RESET_SETTINGS, true);
         }