[jdk17u-dev] RFR: 8285956: (fs) Excessive default poll interval in PollingWatchService

[Tyler Steele]

This PR backports changes that reduce the wait time for a user of the WatchService API on AIX and BSD.

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Commit messages:
 - Backport 1bb4de2e2868a539846ec48dd43fd623c2ba69a5

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/384/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=384&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285956
  Stats: 9 lines in 1 file changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/384.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/384/head:pull/384

PR: https://git.openjdk.java.net/jdk17u-dev/pull/384