Refactor(MediaCheckDialog): Media check to use ViewModel

[criticalAY]

Purpose / Description

• Blocked by dependency Currently blocked by some other dependent / related change feat: Improve Check Media dialog #17842

Migrates the logic of MediaCheck to ViewModel
Split the dialog logic, use different dialog for result and conformation

Approach

Use ViewModel to handle the media check dialog and its result

How Has This Been Tested?

Tested on Google emulator API31
Screen_recording_20250209_030932.webm

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[github-actions]

Important

Maintainers: This PR contains Strings changes

1. Sync Translations before merging this PR and wait for the action to complete
2. Review and merge the auto-generated PR in order to sync all user-submitted translations
3. Sync Translations again and merge the PR so the huge automated string changes caused by merging this PR are by themselves and easy to review

[david-allison]

These 3 lines should be in the ViewModel: returning a Job which we .join() on.

The ViewModel should contain a TODO that we want to move progress notifications here.

(See #17804 for how this could/should be done)