Remove AIDL_FROZEN_REL from step-1/step-2 finalization

That variable is used to ensure all VINTF interfaces are frozen and is
needed for vFRC/VINTF finalization is step-0.
Since SDK finalization (step-1 and step-2) are done at a different time,
they shouldn't care about unfrozen VINTF interfaces.

Ignore-AOSP-First: b/304316873#comment10

Test: na
Bug: 333039895
Change-Id: Ica6807599d5b18078ecea96d939e147d4785749e