Fix the Night Light page UI shrinking

- This problem causes the TwilightLocationPreferenceController too late
  to decide the preference display or not.
- Move the display criteria into the getAvailabilityStatus

Fixes: 159032276
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.display
Test: manual review
Change-Id: I5850479e8a891f837c0e6772ad1096e702f95e34