Add nigeltao@chromium.org to app_service/OWNERS

Change-Id: I6972a8214f1402f21efe8f7afa35c8f135c996d0
Reviewed-on: https://chromium-review.googlesource.com/c/1351976
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612437}
1 file changed