RFR: 8303024: Use Set.of in WindowsFileSystem

[Brian Burkhalter]

On Tue, 21 Feb 2023 18:26:59 GMT, Glavo <duke at openjdk.org> wrote:

> Simply clean up. I need someone to help me open an issue on JBS, thanks.

In order to match the JBS issue, the title of this PR should be changed to:

"8303024: (fs) WindowsFileSystem.supportedFileAttributeViews can use Set.of"

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PR: https://git.openjdk.org/jdk/pull/12697