Add test for Settings#ACTION_NIGHT_DISPLAY_SETTINGS

Bug: 35356645
Test: Verify for both config_nightDisplayAvailable true and false,
adb shell am instrument -e class
com.android.settings.display.NightDisplayTest -w
com.android.settings.tests.unit/android.support.test.runner.AndroidJUnitRunner
Change-Id: I7de3eddf62428d75bef621d3387fa33a76205fe7
1 file changed