This file is indexed.

/etc/apparmor.d/tunables/home is in apparmor 2.7.102-0ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# ------------------------------------------------------------------
#
#    Copyright (C) 2006-2009 Novell/SUSE
#    Copyright (C) 2010 Canonical Ltd.
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#
# ------------------------------------------------------------------

# @{HOME} is a space-separated list of all user home directories. While
# it doesn't refer to a specific home directory (AppArmor doesn't
# enforce discretionary access controls) it can be used as if it did
# refer to a specific home directory
@{HOME}=@{HOMEDIRS}/*/ /root/

# @{HOMEDIRS} is a space-separated list of where user home directories
# are stored, for programs that must enumerate all home directories on a
# system.
@{HOMEDIRS}=/home/

# Also, include files in tunables/home.d for site-specific adjustments to
# @{HOMEDIRS}.
#include <tunables/home.d>