Update dependency androidx.compose:compose-bom to v2026.04.01

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
androidx.compose:compose-bom	2026.03.01 → 2026.04.01

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[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/25010292418/artifacts/6667268510
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	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