[flexiglass] Password bouncer isn't side-by-side on unfolded.

When the auth method is password and a foldable device is unfolded, the
chosen layout is the standard layout and not the side-by-side layout.

Bug: 304630105
Test: please see comment #6 on the attached bug
Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT
Change-Id: Ie15da0f615db18e46b1f1df81d4780b9c7159c72