Customize lock screen button disappears on rotate

Apply constraints on the blueprint section was erroneously setting the
visibility on the view, so any configuration change would ignore the
view's own visibility choice.

Fixes: 322197495
Test: manual -- display the button, then rotate or unfold device, observe proper behavior
Flag: ACONFIG com.android.systemui.keyguard_bottom_area_refactor TEAMFOOD
Change-Id: I4901f966199c1ca39aad167e73440ca2befdf1fc