Feature to remove already uploaded files in autoupload folders to free up space on the device

[daniele-verducci]

Fix https://github.com/nextcloud-gmbh/customer-feature-requests/issues/1475

🖼️ Screenshots

🏚️ Before	🏡 After
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🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/32750778139/artifacts/9529280875
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/32851799446/artifacts/9566752145
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

master-IT test failed: https://www.kaminsky.me/nc-dev/android-integrationTests/17516-IT-master-14-34

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.

[daniele-verducci]

Hey @kra-mo , for the design part, I user what was already there. Can you please have a look at it? In particular the last screen (the completion notification) is probably too cluttered... What do you think?