RFR: 8329227: Seek might hang with fMP4 H.265/HEVC or H.265/HEVC over HTTP/FILE

[Alexander Matveev]

- Fixed by reloading decoder for each seek.
- Tested with all H.265 files for HLS/HTTP/FILE, no issues found.
- Seek performance is not affected or at least I did not notice any performance issues when doing reload for each seek.

This is workaround and no other reasonable solutions were found.

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Commit messages:
 - 8329227: Seek might hang with fMP4 H.265/HEVC or H.265/HEVC over HTTP/FILE

Changes: https://git.openjdk.org/jfx/pull/1775/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1775&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329227
  Stats: 165 lines in 2 files changed: 130 ins; 13 del; 22 mod
  Patch: https://git.openjdk.org/jfx/pull/1775.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1775/head:pull/1775

PR: https://git.openjdk.org/jfx/pull/1775