Add hotline group/user

BUG=b:139411441
TEST=Checked for collisions with display-accts.py --lint, built and
deployed the ip-peripheral and manually verified it worked

Change-Id: I6615594ff138e430ad5dd14b6ee63b7733fcad88
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2240287
Tested-by: Kyle Williams <kdgwill@chromium.org>
Commit-Queue: Kyle Williams <kdgwill@chromium.org>
Auto-Submit: Kyle Williams <kdgwill@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
diff --git a/profiles/base/accounts/group/hotline b/profiles/base/accounts/group/hotline
new file mode 100644
index 0000000..7c84148
--- /dev/null
+++ b/profiles/base/accounts/group/hotline
@@ -0,0 +1,3 @@
+group:hotline
+gid:20157
+users:hotline
diff --git a/profiles/base/accounts/user/hotline b/profiles/base/accounts/user/hotline
new file mode 100644
index 0000000..7b73ec4
--- /dev/null
+++ b/profiles/base/accounts/user/hotline
@@ -0,0 +1,6 @@
+user:hotline
+uid:20157
+gid:20157
+gecos:CfM inter-service Mojo broker
+home:/dev/null
+shell:/bin/false