Add option to disable notification color adjustment to video thumbnail

[XiangRongLin]

Checklist

• I checked, but didn't find any duplicates of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

Add an option to make notification color not adjust to thumbnail of video. Use default colors of NewPipe.

Is your feature request related to a problem? Please describe it

Additional context

I already mentioned this in the v0.20.0 release.
#4332 (comment)

How will you/everyone benefit from this feature?

With everything on my phone being darkmode you have NewPipe which produces brightly colored notifications.

[opusforlife2]

MediaStyle notifications should have gotten a variable to set the notification theme to Dark, Light or System when Google finally added system-wide dark more in Android 10.

[XiangRongLin]

@Stypox Are you going to do this soon? Since i want this feature before going to v0.20.x and the current v0.19.x version has a lot of extractor problems.
If not im going to do it myself, since i think I found the place where it is set.

[opusforlife2]

@XiangRongLin We have lots of things on our plate to fix after 0.20.0. If you could give us a hand it would be a great help.