Add "Add to playlist" and "Remove playlist" while playing an enqueued list on full screen

[SameenAhnaf]

Checklist

• I checked, but didn't find any duplicates (open OR closed) 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

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

While playing an enqeued list, playlists can be added or removed easily while playing on popup or background. That's not possible on full screen. At first, we need to switch to background or popup. Then, the media player notification bar has to be clicked. Then, I can find the option. Shuffle, Loop, Stop playing all three buttons are available on the top of enqueued list. Why not "Add to playlist" and "Remove playlist"?

Additional context

If #5669 and #5742 are implemented, then an extra prompt should appear with three options. How to keep the videos? 1. Order as sorted, 2. Order as playlist, 3. Order as queue. This option will let us do easy splitting.

How will you/everyone benefit from this feature?

Managing playlists will be easier.

[SameenAhnaf]

Closing in favor of #3867.