Do not copy platform ABI dumps from current

In trunk stable, the ABI dumps in "current" directory are not what we
intend to finalize. They need to be removed. The step will be replaced
with a command that builds ABI dumps.

Ignore-AOSP-First: merge conflict
Test: build/make/tools/finalization/finalize-sdk-rel.sh
Bug: 333532038
Change-Id: I08896b637b34861e73cff4d829941d9fb5c56475