Uplift: Close #8904 Use the gecko fetch client when resuming a download

[Amejia481]

Uplift to beta branch: This fixed the downloads being able to be resumed in Beta.

See:
#8906
mozilla-mobile/fenix#9354

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.