RFR: 4964430: (spec) missing IllegalStateException exception requirement for javax.crypto.Cipher.doFinal [v4]

[Ben Perez]

> Updated IllegalStateException exception requirements for `update`, `doFinal`, `wrap`, and `unwrap`

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

  Updated docs for NullCipher to indicate it will not throw and IllegalStateException when calling Cipher methods in bad state

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15727/files
  - new: https://git.openjdk.org/jdk/pull/15727/files/49c729fc..8955ffe5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15727&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15727&range=02-03

  Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15727.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15727/head:pull/15727

PR: https://git.openjdk.org/jdk/pull/15727