Support accessibility settings load title from quick settings panel

- ToggleAccessibilityServicePreferenceFragment for unbundle accessibility service
- LaunchAccessibilityActivityPreferenceFragment for unbundle accessibility shortcut-activity

Bug: 210356011
Test: make RunSettingsRoboTests ROBOTEST_FILTER=LaunchAccessibilityActivityPreferenceFragmentTest ToggleAccessibilityServicePreferenceFragmentTest
Change-Id: I78dcb8dcb2778819ec4bb130a041211598f6d9c

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

@@ -123,7 +123,11 @@ public class LaunchAccessibilityActivityPreferenceFragment extends ToggleFeature
 
     @Override
     CharSequence getTileName() {
-        return null;
+        final ComponentName componentName = getTileComponentName();
+        if (componentName == null) {
+            return null;
+        }
+        return loadTileLabel(getPrefContext(), componentName);
     }
 
     @Override