CATROID-1658 Fix failing test ActionBarUndoSpinnerTest.testUndoSpinnerAction

[hannesweilharter]

Instead of mocking the File class, real sound and look files are generated. This seems to fix the failing testcase.
Additionally, the file was refactored to Kotlin

https://catrobat.atlassian.net/browse/CATROID-1658

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[harshsomankar123-tech]

@hannesweilharter IMO, could you please refactor this test file to Kotlin as well? Since we are currently refactoring many files, and you are already working on fixing the failing tests, I think it would be good if we also migrated this one during the process.
Thanks!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[harshsomankar123-tech]

@hannesweilharter Thanks! LGTM