RFR: 8308808: SunMSCAPI public keys returns internal key array [v4]

[Ben Perez]

> Changed `getEncoded` for both EC and RSA to return a copy of the internal key array to avoid mutability issues.

Ben Perez has updated the pull request incrementally with one additional commit since the last revision:

  added copyrite to test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14425/files
  - new: https://git.openjdk.org/jdk/pull/14425/files/eb5b5948..112a70db

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14425&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14425&range=02-03

  Stats: 30 lines in 1 file changed: 26 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14425.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14425/head:pull/14425

PR: https://git.openjdk.org/jdk/pull/14425