apmanager: Include privetd into apmanager group.

Members of apmanager are allowed to send dbus traffic to org.chromium.peerd.

BUG=chromium:441172
TEST=test_that -b link --fast IP:PORT e:security_AccountsBaseline.*
CQ-DEPEND=CL:234896,CL:234913

Change-Id: I52793cfa111b22cd662b2c7c8ca71b6eb9543011
Reviewed-on: https://chromium-review.googlesource.com/234903
Trybot-Ready: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
diff --git a/profiles/base/accounts/group/apmanager b/profiles/base/accounts/group/apmanager
index b405ece..9ea36e0 100644
--- a/profiles/base/accounts/group/apmanager
+++ b/profiles/base/accounts/group/apmanager
@@ -1,3 +1,3 @@
 group:apmanager
 gid:259
-users:apmanager
+users:apmanager,privetd