Always fit video according to aspect ratio on main and popup player

[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

Main player should completely ditch the 'Fit/Fill/Zoom' option.

Video should fit on left side in case of setting the app on landscape (Same as we see now in case of TV). This will also let us have transcript feature on any view. In case of tall portrait videos on short screen (9:16 videos on 3:4 screen), videos should be zoomed.

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

Android phones have different aspect ratio, so do the videos. The main purpose of main player is to have a hassle-free view. Especially, 'Fit' option is completely useless for portrait videos.

Additional context

Related: #6044, #4484

How will you/everyone benefit from this feature?

Users will be able to enjoy the widest view regardless of setting the app on portrait or landscape. Also, the hassle of changing view frequently especially in case of portrait videos will be removed. If you noticed carefully, 'Fit/Fill/Zoom' doesn't actually work the same for main player and full screen player. That confusion will be also removed.