Add gwifi to usergroup_baseline

Add gwifi and users that need gwifi group access to
usergroup_baseline. This is to allow those users to
create the gwifi reboot reason files.

BUG=b:143378041
TEST=test_image ../build/images/mistral/latest/chromiumos
_test_image.bin UserGroupTest.TestGroups --board=mistral
Cq-Depend: chrome-internal:2087669

Change-Id: I9f9dc0242830174526a29a05126a1c8d3300342b
Reviewed-on: https://chromium-review.googlesource.com/1900097
Tested-by: Bhogeswara Rao Metta <bhogeswararao@google.com>
Commit-Ready: Bhogeswara Rao Metta <bhogeswararao@google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Tao Jin <jintao@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
diff --git a/cros/test/usergroup_baseline.py b/cros/test/usergroup_baseline.py
index a760a0b..0c0aed6 100644
--- a/cros/test/usergroup_baseline.py
+++ b/cros/test/usergroup_baseline.py
@@ -207,6 +207,10 @@
     GroupEntry(group='gdisp', gid=2700,
                users={'gdisp', 'ap-csi-collector', 'ap-csi-preproc',
                       'ap-csi-inference'}),
+    # Add gwifi users to a common gwifi group to allow access of some shared
+    # resources by multiple users.
+    GroupEntry(group='gwifi', gid=2028,
+               users={'gwifi', 'ap-controller', 'ap-update-manager', 'ap-ipv6'}),
 ))
 
 # rialtod:!:400:rialto