Revert "Make sure ac_daemon isn't started before X"

Revert "Make sure ac_daemon isn't started before X"

This reverts commit da44f5ed91a7757baa083364c9b4e765b4f36540.

We will move back ac.service/amd from user session to system.

From the aul maintainer, /usr/bin/amd has to be run as root, reasons:

1. /usr/bin/amd sets app privilege.
2. /usr/bin/amd mounts cgroup subsystem.
3. When handling some command packets, caller's privilege should be checked.
   (Only amd can request terminate  and reset to applications)

Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>