Follow O patterns for a11y settings

Move the summary for the toggled features to a footer.
Make the settings appear as a preference.

Bug: 36780887
Test: Start settings and observe the new UI looks a lot
like the mocks referenced in the bug. Also added unit
test to verify that summary text shows up.

Change-Id: I1d002b194991d0901ecb27198ba5de73bd23a5a9

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

@@ -34,7 +34,6 @@ import android.provider.Settings;
 import android.text.TextUtils;
 import android.view.Menu;
 import android.view.MenuInflater;
-import android.view.MenuItem;
 import android.view.accessibility.AccessibilityManager;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
@@ -79,14 +78,6 @@ public class ToggleAccessibilityServicePreferenceFragment
         // Do not call super. We don't want to see the "Help & feedback" option on this page so as
         // not to confuse users who think they might be able to send feedback about a specific
         // accessibility service from this page.
-
-        // We still want to show the "Settings" menu.
-        if (mSettingsTitle != null && mSettingsIntent != null) {
-            MenuItem menuItem = menu.add(mSettingsTitle);
-            menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            menuItem.setIntent(mSettingsIntent);
-        }
-
     }
 
     @Override