apex: give aiy user permissions to apex

Aiy user does not have permission to r/w to apex devices, so created a
new group apex as well as a udev rule to give r/w permissions to anyone in the group apex.

Change-Id: I942b300c9adcda084b853f24448f7a6c53d9ed0d
2 files changed
tree: 26be71a90ccd86eccba69e2599a70db5b6784f72
  1. debian/
  2. etc/
  3. usr/