Add presubmit hook for hidden API lists.

Check that they're sorted as expected and contain no duplicates.
The sort order now uses:
$ LC_COLLATE=C sort -f

So that non-alphanumeric characters are not ignored, giving a more
intuitive sort order. the '-f' means ignore case.

Also sort the existing lists accordingly.

Test: repo upload
Bug: 64382372
Change-Id: I52b884da33a9a46455df6747a215683d9d3c3218