Add udfps_refactor + refactor_keyguard_dismiss_intent to flexi flags

Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor TRUNKFOOD
Flag: ACONFIG com.android.systemui.refactor_keyguard_dismiss_intent DEVELOPMENT
Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT
Test: atest SharedNotificationContainerViewModelTest
Test: Builds
Bug: 308819693
Change-Id: I9c9627ac7b3c1d566fc343b2b26402a34c4dbd0f