improve end-to-end encryption verifications

[alperozturk96]

No description provided.

[alperozturk96]

/backport to stable-33.1.0

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/24820937000/artifacts/6595578310
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/24821332955/artifacts/6595775477
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/24826434064/artifacts/6597972979
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/24876395324/artifacts/6618888415
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]

Codacy

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	67	67
Dodgy code	219	219
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	42	42
Security	16	16
Total	423	423

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/24877763167/artifacts/6619451908
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.