RFR: JDK-8175386: Clarify exception behavior of Types utility methods [v2]

[Joe Darcy]

> Incremental improvements and clarifications in the specification of Types.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Fix typo found in code review.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17523/files
  - new: https://git.openjdk.org/jdk/pull/17523/files/bdd28dc1..1f327589

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17523&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17523&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17523.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17523/head:pull/17523

PR: https://git.openjdk.org/jdk/pull/17523