Improve remote file fetch

[alperozturk96]

Issue

Purpose of this PR improve the flow not fix every server error.

 Exception in thread "AsyncTask #2" java.lang.RuntimeException: An error occurred while executing doInBackground()
      at android.os.AsyncTask$4.done(AsyncTask.java:415)
      at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:434)
      at java.util.concurrent.FutureTask.setException(FutureTask.java:303)
      at java.util.concurrent.FutureTask.run(FutureTask.java:322)
      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1154)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:652)
      at java.lang.Thread.run(Thread.java:1564)
      Caused by: Exception in thread "AsyncTask #2" com.owncloud.android.operations.RemoteOperationFailedException: Error during saving file with parents: /cc/bb/aa.apk / Datei nicht gefunden
      at com.owncloud.android.datamodel.FileDataStorageManager.saveFileWithParent(FileDataStorageManager.java:624)
      at com.owncloud.android.ui.asynctasks.FetchRemoteFileTask.doInBackground(FetchRemoteFileTask.java:88)
      at com.owncloud.android.ui.asynctasks.FetchRemoteFileTask.doInBackground(FetchRemoteFileTask.java:31)
      at android.os.AsyncTask$3.call(AsyncTask.java:394)
      at java.util.concurrent.FutureTask.run(FutureTask.java:317)
      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1154)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:652)
      at java.lang.Thread.run(Thread.java:1564)

Changes

• Uses lifecycle aware Kotlin coroutines
• Handles all casts, potential errors and logs them
• Prevents static field leak

[github-actions]

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

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	67	67
Dodgy code	216	216
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	42	42
Security	16	16
Total	420	420

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/25371190729/artifacts/6804958259
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)