RFR: 8325448: Hybrid Public Key Encryption [v31]

[Weijun Wang]

> Implement HPKE as defined in https://datatracker.ietf.org/doc/rfc9180/.
> 
> ![HPKEParameterSpec06-27-3](https://github.com/user-attachments/assets/a17e7ea2-86dd-4e2d-9506-210e97ff8ae8)

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

  put comments in correct places

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18411/files
  - new: https://git.openjdk.org/jdk/pull/18411/files/008a5a6f..2d7631e4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18411&range=30
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18411&range=29-30

  Stats: 5 lines in 1 file changed: 2 ins; 2 del; 1 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