Subscription import/export options hidden behind secret UI action

[opusforlife2]

Checklist

• I am using the latest version - 0.21.3
• 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 bug. I will open one issue for every bug report I want to file.

Steps to reproduce the bug

1. Subscribe to at least one channel.
2. Open the Subscriptions tab.

Actual behavior

The import/export options get collapsed into the Subscriptions header. From this point, if a user is not already aware of the fact that the header needs to be tapped to expand the import/export options again, then it probably seems like Newpipe only offers this functionality once.

Expected behavior

The import/export options should be placed somewhere visible, or the action to make them visible should be very obvious to Android users. Or, just don't automatically collapse the header. Let the user figure out how to do that manually.

Another suggestion is given in #7047 (option 2b).

Context

#7326 (comment)

[litetex]

@opusforlife2
Checkout #7458

_{Whoops linked wrong person}

[TacoTheDank]

@noormohammedb Please don't post crashlogs in unrelated issues. This goes in #7411.

A good tip is to search part of the first exception line in the issue search. It should bring up issues where it has been reported.