Wycheproof tests will shield us from making mistakes for the
follow-up refactoring/rewritting CLs.

Change-Id: I585038f2218497d1038ce4857c7de31dc2b6c606
ORIGINAL_AUTHOR=Quan Nguyen <quannguyen@google.com>
GitOrigin-RevId: 6177280951ea114ba7da35b185b655e27dd604f3