Add AV1 codec support

[CastagnaIT]

Check if this PR fulfills these requirements:

• [x] My changes respect the Kodi add-on development rules
• [x] I have read the CONTRIBUTING document.
• [x] I made sure there wasn't another Pull Request opened for the same update/change
• [x] I have successfully tested my changes locally

Types of changes

• [x] New feature (non-breaking change which adds functionality)
• [ ] Feature change (non-breaking change which changes behaviour of an existing functionality)
• [ ] Improvement (non-breaking change which improves functionality)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Refactor (non-breaking performance or readability improvements)

Description

This add AV1 codec support

To make it works is needed changes in InputStream Adaptive and in Kodi core, see: https://github.com/xbmc/inputstream.adaptive/pull/972

To enable it go to addon Expert settings:

• turn off VP9 profile
• turn on AV1 profile

In case of Feature change / Breaking change:

Describe the current behavior

Describe the new behavior

Screenshots (if appropriate):

[rjousse18]

I have some questions, all 4k HDR content on netflix are now in AV1 ? And will it be usable on rpi 4 ? thanks

[CastagnaIT]

this is pretty WIP and not well tested mainly netflix use AV1 to replace AVC(H.264) and i don't think netflix provide AV1-HDR for now RPI use software decoding only for DRM, then if the CPU is powerful enough it will be able to have smooth playback