RFR: 8350224: Deproblemlist javax/swing/JComboBox/TestComboBoxComponentRendering.java

[Prasanta Sadhukhan]

Test is failing in ubuntu 23.x and beyond with expected red pixel not being picked up
Increase in fontsize increase the possibility of font red pixel being picked up. 
Test is now passing in ubuntu 24.04 and in CI..

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Commit messages:
 - Copyright
 - deprob

Changes: https://git.openjdk.org/jdk/pull/23670/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23670&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350224
  Stats: 7 lines in 2 files changed: 2 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23670.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23670/head:pull/23670

PR: https://git.openjdk.org/jdk/pull/23670