policy_readers: Add secagentd

secagentd needs to read device policy to know if DeviceReportXDREvents
is enabled.

BUG=b:241578773
TEST=None

Cq-Depend: chromium:4000547

Change-Id: I318fc1e725112ca15f107c5e36703bba50f48673
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/3997404
Reviewed-by: Aashay Shringarpure <aashay@google.com>
Reviewed-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Ryan Borzello <rborzello@google.com>
Auto-Submit: Ryan Borzello <rborzello@google.com>
Tested-by: Ryan Borzello <rborzello@google.com>
diff --git a/profiles/base/accounts/group/policy-readers b/profiles/base/accounts/group/policy-readers
index 7371f2c..98cac49 100644
--- a/profiles/base/accounts/group/policy-readers
+++ b/profiles/base/accounts/group/policy-readers
@@ -1,4 +1,4 @@
 # Members have read access to the device policy in /var/lib/devicesettings.
 group:policy-readers
 gid:303
-users:attestation,authpolicyd,chronos,hardware_verifier,u2f,shill
+users:attestation,authpolicyd,chronos,hardware_verifier,secagentd,shill,u2f