fix: upload cancel

[alperozturk96]

• Tests written, or not not needed

Issue

When the user presses Cancel during an upload, the ongoing or pending upload must be properly cancelled and reflected in the upload list.

Scenarios

• From Notification:
  When the user presses the cancel button in the notification, the ongoing upload should stop immediately.

• From Upload List Screen:
  When the user cancels from the upload list, the corresponding upload should also be stopped.

Expected Behavior

• The upload operation is cancelled gracefully.
• The cancellation reason is recorded.
• Cancelled uploads must be visible in the upload list (marked as cancelled).

How to Test

1. Start a file upload.
2. Cancel from the notification → upload should stop and appear as cancelled in the upload list.
3. Start another upload.
4. Cancel from the upload list screen → upload should stop and appear as cancelled in the upload list.

[alperozturk96]

@tobiasKaminsky Why do we have two different place for uploads?

ProviderTableMeta.UPLOADS_TABLE_NAME and CONTENT_URI_UPLOADS

[alperozturk96]

/backport to stable-3.34

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/15712.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	45	46
Errors	11	11

SpotBugs

Category	Base	New
Bad practice	46	46
Correctness	74	74
Dodgy code	268	268
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	35	35
Performance	49	49
Security	18	18
Total	500	500

Lint increased!