RFR: 8189441: Define algorithm names for keys derived from KeyAgreement [v13]

[Weijun Wang]

> Allow `Generic` as an algorithm in the `KeyAgreement::generateSecret(alg)` method.

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

  better exception messages

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22650/files
  - new: https://git.openjdk.org/jdk/pull/22650/files/70279181..45e32669

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22650&range=12
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22650&range=11-12

  Stats: 13 lines in 7 files changed: 1 ins; 1 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/22650.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22650/head:pull/22650

PR: https://git.openjdk.org/jdk/pull/22650