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

[Joe Darcy]

On Mon, 22 Jan 2024 21:51:57 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Incremental improvements and clarifications in the specification of Types.

More extensive improvements and testing may be done subsequently under JDK-8055219.

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PR Comment: https://git.openjdk.org/jdk/pull/17523#issuecomment-1904885634