SpotBugs: Fix Method ignores exceptional return value - RenameFileOperation

[alexknop]

There are 16 SpotBugs under

Bad practice:
RV: Bad use of return value from method (16: 0/16/0/0)
Method ignores exceptional return value (16: 0/16/0/0)

Solution:
Leveraging the more modern java.nio.Files library and conducting these make directory, delete, etc. functions via that.
Changing a Submit to an Execute function

[github-actions]

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[tobiasKaminsky]

Can you check why spotbugs has increased?

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/15591.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.