RFR: 8337124: (fs) sun.nio.fs.WindowsSecurity.enablePrivilege should pin when continuations supported

[Brian Burkhalter]

On Wed, 24 Jul 2024 23:49:32 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> In `sun.nio.fs.WindowsSecurity.enablePrivilege`, change `PreviewFeatures.isEnabled` to `ContinuationSupport.isSupported`.

CI tiers 1-3 passed.

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PR Comment: https://git.openjdk.org/jdk/pull/20319#issuecomment-2249077416