Add cfm-monitor to video group in order for huddly-monitor to make ioctl
calls to /dev/video0.

BUG=b:132823697,b:128691119
TEST=Locally built, deployed to a Teemo, with crrev.com/c/1700144, crrev.com/c/1710204 changes and restart huddly-monitor.
Checked if the huddly-monitor successfully logged temperature and power without errors.

Cq-Depend: chromium:1716007
Change-Id: I020959c58f612484c93e22443681f2cac23abef1
Reviewed-on: https://chromium-review.googlesource.com/1709939
Tested-by: Jazbel Wang <jazbel@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Kyle Williams <kdgwill@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Pablo Ceballos <pceballos@chromium.org>
diff --git a/profiles/base/accounts/group/video b/profiles/base/accounts/group/video
index 6a8e97b..00836a2 100644
--- a/profiles/base/accounts/group/video
+++ b/profiles/base/accounts/group/video
@@ -1,3 +1,3 @@
 group:video
 gid:27
-users:root,chronos,arc-camera,dlm,rtanalytics,crosvm
+users:root,chronos,arc-camera,dlm,rtanalytics,crosvm,cfm-monitor