[jfx11u] RFR: 8268152: gstmpegaudioparse does not provides timestamps for HLS MP3 streams

[Kevin Rushforth]

This is a clean backport of a GStreamer audio fix for a regression caused by the recent GStreamer 1.18.3 update in [JDK-8262365](https://bugs.openjdk.java.net/browse/JDK-8262365). I tested it on all three platforms.

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Commit messages:
 - 8268152: gstmpegaudioparse does not provides timestamps for HLS MP3 streams

Changes: https://git.openjdk.java.net/jfx11u/pull/22/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=22&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268152
  Stats: 10 lines in 2 files changed: 10 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx11u/pull/22.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/22/head:pull/22

PR: https://git.openjdk.java.net/jfx11u/pull/22