Disable NotifLiveData flag for LegacyLightsOutNotifControllerTest

LegacyLightsOutNotifController supposed to be deleted with this refactor flag, therefore it cannot be constructed if the flag is on.

Bug: 324436985
Test: atest LegacyLightsOutNotifControllerTest
Flag: ACONFIG com.android.systemui.notifications_live_data_store_refactor DEVELOPMENT
Change-Id: I907e3afee774f08a60b72bf596f44cf9abd75e99