[jdk21u-dev] RFR: 8320655: awt screencast robot spin and sync issues with native libpipewire api

[Martin Doerr]

Clean backport of [JDK-8320655](https://bugs.openjdk.org/browse/JDK-8320655).

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Commit messages:
 - Backport c17b8cfafe5a2bbe29d38cfc6793c72b0430f6ca

Changes: https://git.openjdk.org/jdk21u-dev/pull/779/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=779&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320655
  Stats: 32 lines in 1 file changed: 28 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/779.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/779/head:pull/779

PR: https://git.openjdk.org/jdk21u-dev/pull/779