[jdk20] RFR: 8298726: (fs) Change PollingWatchService to record last modified time as FileTime rather than milliseconds

[Tyler Steele]

On Tue, 20 Dec 2022 17:29:30 GMT, Tyler Steele <tsteele at openjdk.org> wrote:

> This change fixes an issue with a jck test described in [JDK-8297275](https://bugs.openjdk.org/browse/JDK-8297275). The change applies cleanly.

All testing successful. Merging as per the issue comments.

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PR: https://git.openjdk.org/jdk20/pull/64