[jdk17u-dev] RFR: 8225777: java/awt/Mixing/MixingOnDialog.java fails on Ubuntu

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport 36f2e5240b8c4d94643188d3a9d87d906c1e8bdf

Changes: https://git.openjdk.org/jdk17u-dev/pull/3707/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8225777
  Stats: 177 lines in 2 files changed: 7 ins; 141 del; 29 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3707.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3707/head:pull/3707

PR: https://git.openjdk.org/jdk17u-dev/pull/3707