RFR: 8273096: Add support for H.265/HEVC to JavaFX Media [v3]

[Alexander Matveev]

> - Added support for H.265/HEVC for all 3 platforms.
>  - Support is added only for .mp4 files over FILE/HTTP/HTTPS protocols. HTTP Live Streaming with H.265/HEVC is not supported.
>  - On Windows mfwrapper was introduced which uses Media Foundation APIs to decode HEVC.
>  - 10 and 12-bit HEVC was tested and also supported, however due to graphics pipeline not supporting 10-bit YUV rendering we will use color converter to convert video frame to 8-bit before sending it for rendering.
>  - Resolution upto 4k is supported.
> 
> Additional runtime dependency requirements:
> Windows: Windows 10 with HEVC Video Extensions installed.
> macOS: macOS High Sierra and later
> Linux: at least libavcodec56 and libswscale5
> 
> Additional build dependency:
> Linux: libswscale-dev

Alexander Matveev has updated the pull request incrementally with one additional commit since the last revision:

  8273096: Add support for H.265/HEVC to JavaFX Media [v4]

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/649/files
  - new: https://git.openjdk.java.net/jfx/pull/649/files/6cb1ac5c..cb1ee6c2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=649&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=649&range=01-02

  Stats: 110 lines in 1 file changed: 13 ins; 80 del; 17 mod
  Patch: https://git.openjdk.java.net/jfx/pull/649.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/649/head:pull/649

PR: https://git.openjdk.java.net/jfx/pull/649