Add support for H.265/HEVC to JavaFX Media

Summary

Add a new media format (H.265/HEVC) to Javadoc as supported media format.

Problem

With JDK-8273096 we added a new media format called H.265/HEVC and we need to add it to the list of supported media formats.

Solution

Add H.265/HEVC as supported media format to "Media Encoding" and "Media Container / Encoding Types" tables in package summary of JavaFX Media API.

Specification

javafx/scene/media/package-summary.html

Following row will be added to "Media Encoding Table" types:

| Encoding | Type | Description |
| H.265/HEVC | Video | H.265/MPEG-H Part 2 / HEVC (High Efficiency Video Coding) video compression |

Following row will be added to "Media Container / Encoding Types Table" types:

| Container | Description | Video Encoding | Audio Encoding | MIME Type | File Extension |
| MP4 | MPEG-4 Part 14 | H.265/HEVC | AAC | video/mp4, audio/x-m4a, video/x-m4v | .mp4, .m4a, .m4v |