In Split Screen maximize video

[Dakkaron]

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

When in split screen mode, the video should be maximized to fill the area, the way the official Youtube app does it.

At least, when the full screen button is pressed, this should be the result. Currently, the full screen button does nothing in split screen mode.

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

When I use NewPipe in split screen mode, the app tries to squeeze the full view into the tiny split screen view, instead of displaying only the video. This makes it very tiny.

Additional context

How will you/everyone benefit from this feature?

This feature would allow multitasking while watching videos. Currently, I am stuck with a tiny video and half the screen wasted.

[Dakkaron]

I made a build where DeviceUtils.isTablet() always returns false and there the problem does not occur. So it appears to only be a problem when in tablet mode.