[jdk11u-dev] RFR: 8257769: Cipher.getParameters() throws NPE for ChaCha20-Poly1305

[Goetz Lindenmaier]

I backport this for parity with 11.0.15-oracle.

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

Commit messages:
 - Backport 500ab45770d9544401edf133aaf7cf7236a69cd8

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/686/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=686&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257769
  Stats: 125 lines in 2 files changed: 119 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/686.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/686/head:pull/686

PR: https://git.openjdk.java.net/jdk11u-dev/pull/686