ubuntu@ubuntu:~$ snap --version
snap    2.23.6
snapd   2.23.6
series  16
ubuntu  16.04
kernel  4.8.0-36-generic
ubuntu@ubuntu:~$ anbox-installer 
snap-confine has elevated permissions and is not confined but should be. Refusing to continue to avoid permission escalation attacks
ubuntu@ubuntu:~$ ls -alh /usr/lib/snapd/
total 24M
drwxr-xr-x   2 root root  180 Apr  4 18:25 .
drwxr-xr-x 169 root root  520 Apr  4 18:25 ..
-rw-r--r--   1 root root   15 Feb 24 13:21 info
-rwsr-xr-x   1 root root  56K Feb 24 13:24 snap-confine
-rwxr-xr-x   1 root root  19M Feb 24 13:24 snapd
-rwxr-xr-x   1 root root  23K Feb 24 13:24 snap-discard-ns
-rwxr-xr-x   1 root root 4.9M Feb 24 13:24 snap-exec
-rwxr-xr-x   1 root root 6.2K Feb 24 13:24 snap-update-ns
-rwxr-xr-x   1 root root 833K Feb 24 13:24 system-shutdown
ubuntu@ubuntu:~$ sudo apparmor_status 
apparmor module is loaded.
2 profiles are loaded.
1 profiles are in enforce mode.
   snap.core.hook.configure
1 profiles are in complain mode.
   snap.anbox-installer.anbox-installer
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
ubuntu@ubuntu:~$ sudo apparmor_parser -a /etc/apparmor.d/usr.lib.snapd.snap-confine 
ubuntu@ubuntu:~$ anbox-installer 
/usr/lib/snapd/snap-confine: error while loading shared libraries: libudev.so.1: cannot open shared object file: No such file or directory
ubuntu@ubuntu:~$ ls -alh /lib/x86_64-linux-gnu/libudev.so.1
lrwxrwxrwx 1 root root 16 Jan 18 22:04 /lib/x86_64-linux-gnu/libudev.so.1 -> libudev.so.1.6.4