cros-disks: Add {group,user}/fuse-archivemount

BUG=chromium:1216245
TEST=display-accts.py --show-free; ensure IDs are no longer available

Change-Id: I9ac65a6c2a7659460946e0924ae53c406204ce77
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2982358
Tested-by: Nigel Tao <nigeltao@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
diff --git a/profiles/base/accounts/group/fuse-archivemount b/profiles/base/accounts/group/fuse-archivemount
new file mode 100644
index 0000000..3293c9f
--- /dev/null
+++ b/profiles/base/accounts/group/fuse-archivemount
@@ -0,0 +1,2 @@
+group:fuse-archivemount
+gid:311
diff --git a/profiles/base/accounts/user/fuse-archivemount b/profiles/base/accounts/user/fuse-archivemount
new file mode 100644
index 0000000..eccd860
--- /dev/null
+++ b/profiles/base/accounts/user/fuse-archivemount
@@ -0,0 +1,6 @@
+user:fuse-archivemount
+uid:311
+gid:311
+gecos:FUSE-based archive mounter
+home:/dev/null
+shell:/bin/false