RFR: JDK-8284851 Update javax.crypto files to use proper javadoc for mentioned classes [v2]

[Mark Powers]

> https://bugs.openjdk.org/browse/JDK-8284851

Mark Powers has updated the pull request incrementally with one additional commit since the last revision:

  Valerie fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9282/files
  - new: https://git.openjdk.org/jdk/pull/9282/files/77384537..eadba29f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9282&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9282&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9282.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9282/head:pull/9282

PR: https://git.openjdk.org/jdk/pull/9282