Improvements to visuals and controls in notification

[GilesMunn]

Describe your suggested feature

The notification for currently-playing videos is currently low-resolution, would it be possible to use the highest-quality version of the thumbnail to use as the banner so that the notification background looked less pixelated?

It'd also be nice if we could have Fastforward/Rewind buttons added to the notification controls, such as can be found in the VLC app here:

They can also work alongside the Back/Next buttons if you're currently watching a playlist (we currently only have the Back button), as can be seen here:

Other details

No response

Acknowledgements

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[Bnyro]

Before TeamNewPipe/NewPipeExtractor#889 gets merged, we can't get a better resolution of the thumbnail without risks unfortunately. We could try something like TeamNewPipe/NewPipeExtractor#268 (comment), but that could result in no thumbnail being found in the end.

[GilesMunn]

Could we perhaps try the mentioned method and have the current system as a fallback if none are found?

[Bnyro]

We could try to do so, afaik Coil supports fallback sources by default so should be doable I guess

[Silther]

On older devices (or partly new ones, thanks samsung) the new media player is not yet supported and e.g. the cover image was once cropped to a square, which no longer works.

[Bnyro]

Looks like we already get the best thumbnail resolution from the API, the issue seems to be androidx/media#168

[Silther]

On older devices (or partly new ones, thanks samsung) the new media player is not yet supported and e.g. the cover image was once cropped to a square, which no longer works.

What about this?