RFR: 8325448: Hybrid Public Key Encryption [v21]

[Weijun Wang]

> Implement HPKE as defined in https://datatracker.ietf.org/doc/rfc9180/.
> 
> ![HPKEParameterSpec06-27](https://github.com/user-attachments/assets/d0425a10-a312-4a95-8cee-2fbec5d83ddd)

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  some spec change

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18411/files
  - new: https://git.openjdk.org/jdk/pull/18411/files/30c79948..787702da

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18411&range=20
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18411&range=19-20

  Stats: 32 lines in 2 files changed: 13 ins; 10 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/18411.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18411/head:pull/18411

PR: https://git.openjdk.org/jdk/pull/18411