fix(upload-list): improve performance, notify observers on main thread

[alperozturk96]

Issue

java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter position HeaderViewHolder{ffdbfb8 position=5 id=-1, oldPos=-1, pLpos:-1
...adapter:com.owncloud.android.ui.adapter.UploadListAdapter@8b71d77 

Changes

• Notify observers on the main thread from UploadStorageManager.
• Convert UploadListActivity.java to Kotlin and simplify its logic.

Side notes

To achieve better performance and a smoother user experience in the upload list, the following components need proper thread handling:

UploadStorageManager
UploadListActivity
UploadListAdapter
...

So that we can fully leverage Kotlin features such as coroutines, null safety, and improved thread management. It also provides greater flexibility for future work, especially the planned implementation of navigation. Conversion activities to fragments.

The next step will be converting UploadStorageManager. Then probably rely on DAO functions instead of cursor overhead.

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	38	37
Correctness	70	69
Dodgy code	231	230
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	42	42
Security	16	16
Total	441	438

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/23839146770/artifacts/6216373960
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]

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