HACK: allow pre-release SDKs from any prerelease platform.

SDK-1 pre-release APKs might not be updated in time we switch to SDK+1.
This causes test failures.

Technically it's only necessary starting from udc-dev-plus-aosp.
Keeping both HACK CLs in udc-dev for less churn.

Bug: 275409981
Test: run locally finalization REL step
Change-Id: I78f7ae0f519088110d14787450f015d1e8ed2f46
Merged-In: I78f7ae0f519088110d14787450f015d1e8ed2f46