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