RFR: 8353453: URLDecoder should use HexFormat

[duke]

On Sat, 29 Mar 2025 17:27:20 GMT, Patrick Strawderman <duke at openjdk.org> wrote:

> Use `HexFormat.fromHexDigits` in URLDecoder, instead of `Integer.parseInt`.

@kilink 
Your change (at version 64ddccdaeeaec4e1196976d3c5f4c329008dd4ef) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/24314#issuecomment-2779690972