Fix taskbar visibility when shade moves display in flexiglass

The sysui state bit was being changed based on "ShadeDisplaysInteractor.displayId" instead of "pendingDisplayId". The DisplayId changes only after the reparenting finishes, while the pending is what triggers the move.
Due to that, we were reading the old display id.

+ minor fixes to SysUiState.kt debug logs

Bug: 432202736
Flag: com.android.systemui.shade_window_goes_around
Test: OpenShadeHidesTaskbarOnExternalDisplay
Change-Id: I580abe4380b6efab66e2828be199b91444643320