NPVC should uses the top of the DeviceEntryIcon to calc space for notifs

This handles when device_entry_udfps_refactor is enabled and the nssl
migration is not enabled.

Test: atest NotificationPanelViewControllerTest
Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor DEVELOPMENT
Fixes: 323404505
Change-Id: Iaf0831851f498bec9716d85b7da2c4fc7b83e31e