Add back the entrance of magnification settings in master branch

Bug: 146473544
Test: make RunSettingsRoboTests
Change-Id: I2e040c0b722944077dd026c32f195e5a45a52c88

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

@@ -187,6 +187,11 @@ public class ToggleScreenMagnificationPreferenceFragment extends
 
         initShortcutPreference();
 
+        mSettingsPreference = new Preference(getPrefContext());
+        mSettingsPreference.setTitle(R.string.accessibility_menu_item_settings);
+        mSettingsPreference.setFragment(MagnificationSettingsFragment.class.getName());
+        mSettingsPreference.setPersistent(false);
+
         super.onViewCreated(view, savedInstanceState);
     }