lint: do not warn on old target, we check this on our own

[tobiasKaminsky]

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🏁 Checklist

• Tests written, or not not needed

[Copilot]

Pull request overview

Updates the Android app module’s lint configuration to suppress warnings about targeting an older API level, relying on project-specific enforcement instead.

Changes:

• Added OldTargetApi to the disabled Android Lint checks in app.
• Adjusted the disabled-check list formatting to accommodate the new entry.

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[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	71	67
Dodgy code	218	219
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	42	42
Security	16	16
Total	426	423

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/25150760583/artifacts/6724294278
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)