Implemented tests for encrypted folders

[daniele-verducci]

Tests for encrypted (sub)folders.
Related: #17608

⚠️ The encrypted subfolders-related tests are supposed to fail in this one, until #17608 is merged
The folder unencryption test is failing as well, as the feature it's not working in the current master app!

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI (N/A)

[codecov]

Codecov Report

❌ Patch coverage is 57.89474% with 56 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...i/dialog/setupEncryption/EncryptionKeyGenerator.kt	76.92%	16 Missing and 5 partials ⚠️
...cloud/android/operations/e2e/E2EDeletionService.kt	30.00%	9 Missing and 5 partials ⚠️
...g/setupEncryption/SetupEncryptionDialogFragment.kt	0.00%	13 Missing ⚠️
...m/owncloud/android/ui/fragment/FolderEncryption.kt	0.00%	8 Missing ⚠️

📢 Thoughts on this report? Let us know!

[github-actions]

📱 QA build

Download	app-qa-debug.apk
QR code	Open the QR code for this download
Commit	2d25b83
Version	17697
Available until	7 days after this build

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[github-actions]

stable22-IT test failed, but no output was generated. Maybe a preliminary stage failed.

[alperozturk96]

/backport to stable-35.0.x

[daniele-verducci]

@alperozturk96 so now only testReadEncryptedSubfolder should fail.
In first post I said testCreateEncryptedSubfolder should fail, but it's wrong: in fact, when creating an encrypted subfolder the app crashes because after successfully creating it, tries to open it . So it's right all the tests are good but testReadEncryptedSubfolder fails.

[github-actions]

master-IT test failed: https://www.kaminsky.me/nc-dev/android-integrationTests/17697-IT-master-16-00

[github-actions]

stable35-IT test failed: https://www.kaminsky.me/nc-dev/android-integrationTests/17697-IT-stable35-16-05

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	32	32
Correctness	56	56
Dodgy code	184	184
Experimental	1	1
Malicious code vulnerability	2	2
Multithreaded correctness	26	26
Performance	35	35
Security	17	17
Total	353	353

[github-actions]

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