[jdk11u-dev] RFR: 8286846: test/jdk/javax/swing/plaf/aqua/CustomComboBoxFocusTest.java fails on mac aarch64

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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Commit messages:
 - Backport d7341ae42e11fd08508c5f9c67c09c44b62da59b

Changes: https://git.openjdk.org/jdk11u-dev/pull/2351/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2351&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286846
  Stats: 40 lines in 1 file changed: 21 ins; 9 del; 10 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2351.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2351/head:pull/2351

PR: https://git.openjdk.org/jdk11u-dev/pull/2351