NaturalSortTest: shuffle instead of duplicating parameters
Rename TestSorting to OCFileSortTest, conver to Kotlin, parameterize
TestSorting: refactor and simplify since it's now only for OCFiles
Move string sort tests from TestSorting to NaturalSortTest
Move TestSorting to unit tests
Test AlphanumComparator
Update translations
Update Nextcloud Android library
Update 3rd-party dependencies