video: Add runtime_probe

runtime_probe needs to access /dev/video* to query device capabilities.

BUG=None
TEST=None

Cq-Depend: chromium:2927812
Change-Id: If162789d14af54e7c7a58db75afa5ead2c6ebb05
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2928876
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
Tested-by: Kevin Lin <kevinptt@chromium.org>
Commit-Queue: Kevin Lin <kevinptt@chromium.org>
diff --git a/profiles/base/accounts/group/video b/profiles/base/accounts/group/video
index 6347d0b..1c41640 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,cfm-monitor,smdisplay,cdm-oemcrypto
+users:root,chronos,arc-camera,dlm,rtanalytics,crosvm,cfm-monitor,runtime_probe,smdisplay,cdm-oemcrypto