RFR: 8346693: Update copyright header for files modified in 2024

[Ambarish Rapte]

Update copyright year in files updated in the year 2024, as we reach end of the year.

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Commit messages:
 - 8346693: Update copyright header for files modified in 2024

Changes: https://git.openjdk.org/jfx/pull/1666/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1666&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346693
  Stats: 470 lines in 470 files changed: 0 ins; 0 del; 470 mod
  Patch: https://git.openjdk.org/jfx/pull/1666.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1666/head:pull/1666

PR: https://git.openjdk.org/jfx/pull/1666