Update osh-viewer to support H265/HEVC video

[Cardy2]

Changes:

• Updated WebCodecView to handle the additional parameter sets needed to decode H265 video.
• Removed unnecessary reconfigure calls so that no keyframe errors are hit due to reconfiguring while data is in midflight
• Removed compression !== 'h265' condition from in VideoView createVideoView() for defaulting the use of WebCodecApi

[Cardy2]

Current development/testing branch:
https://github.com/Cardy2/osh-viewer/tree/add-hevc-support

[Cardy2]

Updated WebCodecView by adding the logic necessary for decoding H265 video. Eventually this logic will be extracted to a shared helper class that will hold the parameter-set state and the Annex-B helpers for both WebCodecView & FFMPEGView. Currently both will display video but FFMPEG still needs to be updated.