Add new owners for extensions/device_local_account*

Bug: none
Change-Id: I0504191f5ca6b16c36660a2d6de278d3205fc898
Reviewed-on: https://chromium-review.googlesource.com/1179822Reviewed-by: Drew Wilson <atwilson@chromium.org>
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: Drew Wilson <atwilson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584383}

chrome/browser/chromeos/extensions/OWNERS

@@ -11,7 +11,9 @@ per-file input_method*=shuchen@chromium.org
 per-file input_method*=nona@chromium.org
 per-file ime_menu*=shuchen@chromium.org
 
-# DeviceLocalAccount reviewers. bartfab@ is primary, atwilson@ is backup.
+# DeviceLocalAccount reviewers. emaxx@ is primary, others are backup.
+per-file device_local_account*=emaxx@chromium.org
+per-file device_local_account*=isandrk@chromium.org
 per-file device_local_account*=atwilson@chromium.org
 per-file device_local_account*=bartfab@chromium.org