Remove naming conventioned based file sorting in java_api_library

With api_files property being removed from java_api_library, all api
files are passed to java_api_library via java_api_contribution, which
provide api_surface information. Instead of relying on the naming
convention of the api files, java_api_library can utilize this
information to sort the api files from narrower api scope to the wider
api scope.

Test: m --build-from-text-stub
Bug: 295429988
Change-Id: Idd832778833c072c6b7e9d1f775533e5f4e2af00