RFR: 4936767: Parameters for MessageDigest [v7]

[Weijun Wang]

> Add parameters to `MessageDigest` and introduce `SHAKE256-LEN` with an integer parameter.

Weijun Wang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:

 - SHAKE128-LEN, tests
 - Merge branch 'master' into 4936767
 - more spec change, restruct SHAKE256.java
 - Revert "throw iape"
   
   This reverts commit d01bf93999d85081734f131873a94009d55ae364.
 - no len no params
 - full imports
 - cite resources
 - throw iape
 - new class spec
 - more changes
 - ... and 1 more: https://git.openjdk.org/jdk/compare/af014756...711d6cae

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16660/files
  - new: https://git.openjdk.org/jdk/pull/16660/files/f8c18ed0..711d6cae

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16660&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16660&range=05-06

  Stats: 631316 lines in 1197 files changed: 89045 ins; 478130 del; 64141 mod
  Patch: https://git.openjdk.org/jdk/pull/16660.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16660/head:pull/16660

PR: https://git.openjdk.org/jdk/pull/16660