fix(file-list): file indicator folder downloaded check

[alperozturk96]

Issue

java.lang.NullPointerException: getEtag(...) must not be null
at com.owncloud.android.ui.adapter.OCFileListDelegate.showLocalFileIndicator(OCFileListDelegate.kt:355)
at com.owncloud.android.ui.adapter.OCFileListDelegate.bindGridMetadataViews(OCFileListDelegate.kt:335)
at com.owncloud.android.ui.adapter.OCFileListDelegate.bindViewHolder(OCFileListDelegate.kt:232)

[alperozturk96]

/backport to stable-33.1.0

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/24389636697/artifacts/6423753764
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.

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	69	69
Dodgy code	227	227
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	42	42
Security	16	16
Total	433	433