RFR: 8340721: Clarify special case handling of unboxedType and getWildcardType [v3]

[Maurizio Cimadamore]

On Fri, 27 Sep 2024 17:21:15 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> First piece of a larger set of updates that may be made for JDK-8055219 to clarify the exceptional behavior of `javax.lang.model.util.Types`.
>
> Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Respond to review feedback.

Marked as reviewed by mcimadamore (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21193#pullrequestreview-2334686295