do not start shutdown animation from init

- init will only keep animation related services as shutdown critical.
- external component like system server can start shutdown animation.

bug: 37500823
Test: reboot

(cherry picked from commit e2b04b71ae3792e2d8d2fda537343549ebfcc8bb)

Change-Id: I9a0432148887557b705d6b8bbe35f5fb1ffad5b9
1 file changed