/etc/apparmor.d/usr.lib.dovecot.managesieve is in apparmor-profiles 2.10.95-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | # ------------------------------------------------------------------
#
#    Copyright (C) 2013 Christian Boltz
#    Copyright (C) 2014 Christian Wittmer
#
#    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.
#
# ------------------------------------------------------------------
# vim: ft=apparmor
#include <tunables/global>
#include <tunables/dovecot>
/usr/lib/dovecot/managesieve flags=(complain) {
  #include <abstractions/base>
  #include <abstractions/dovecot-common>
  capability setuid,
  network inet stream,
  network inet6 stream,
  @{DOVECOT_MAILSTORE}/ rw,
  @{DOVECOT_MAILSTORE}/** rwkl,
  /etc/dovecot/** r,
  /usr/bin/doveconf rix,
  /usr/lib/dovecot/managesieve mrix,
  # Site-specific additions and overrides. See local/README for details.
  #include <local/usr.lib.dovecot.managesieve>
}
 |