Set zip archiver flag owners to files team.

BUG=None

Change-Id: I259903cf7197ca584d2414dfd4a814e92d029e29
Reviewed-on: https://chromium-review.googlesource.com/c/1341430
Commit-Queue: Anand Mistry <amistry@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609484}

chrome/browser/flag-metadata.json

@@ -579,7 +579,7 @@
   },
   {
     "name": "disable-new-zip-unpacker",
-    // "owners": [ "your-team" ],
+    "owners": [ "chromeos-files-syd@google.com" ],
     "expiry_milestone": 76
   },
   {