Add export function to HPKE. New tests added. Note that this PR does not compile without https://github.com/openjdk/jdk/pull/18409, even if they are touching different files.
------------- Commit messages: - the fix Changes: https://git.openjdk.org/jdk/pull/30146/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30146&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8379541 Stats: 74 lines in 4 files changed: 64 ins; 0 del; 10 mod Patch: https://git.openjdk.org/jdk/pull/30146.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30146/head:pull/30146 PR: https://git.openjdk.org/jdk/pull/30146
