Sorting owners by score is non-deterministic, so sort by
name too.

Bug: 1009814
Change-Id: I93a9370a5852634b4bbb2768b9ebbb5b866348e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1891665
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Anthony Polito <apolito@google.com>