Currently the returned language tag(s) from those methods are all in lower case letters. Although language tags/subtags are case inensitive, instead of converting the matching language tag(s) to lowercase, these methods should preserve the case of input language tag(s)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute the code below


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public static void main(String[] args) {
    List<LanguageRange> priorityList = LanguageRange.parse("*-CH");
    List<String> matchingTags = Locale.filterTags(priorityList, List.of("de-CH", "hi-in", "En-GB"),
FilteringMode.AUTOSELECT_FILTERING);
    System.out.println(matchingTags);
}
---------- END SOURCE ----------

EXPECTED: "de-CH"
FOUND: "de-ch"