ShutdownThread: Turn screen on during shutdown

Summary:
Screen should wake up from low power mode during shutdown,
to notify the user that the phone is shutting down.
This will result in better user experience.

Orig-Change-Id: I06b2c5c7a56795a65c6f49470d9b68b03b65c669

Change-Id: I265cfbb939e1109fbba609b133bcc3f418ef0bcd
Signed-off-by: Pavan Kumar S <pavan.kumar.s@intel.com>
Signed-off-by: Jian Luo <jian.luo@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 103672

Test Plan: it builds, it works

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D414