[jfx23u] RFR: 8338701: Provide media support for libavcodec version 61

[Alexander Matveev]

Clean backport of JDK-8338701.

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Commit messages:
 - Backport 6115b396bacf62f39dcaa93c7c0adcd60b428b8c

Changes: https://git.openjdk.org/jfx23u/pull/18/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx23u&pr=18&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338701
  Stats: 56 lines in 6 files changed: 45 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jfx23u/pull/18.diff
  Fetch: git fetch https://git.openjdk.org/jfx23u.git pull/18/head:pull/18

PR: https://git.openjdk.org/jfx23u/pull/18