Fix Home-press on screen off bug.

As soon as the screen goes off while using an app, pressing the Home button
should now simply screen-on & resume the running app, instead of screen-on &
jumping back to Launcher Home Screen.

-Credits to CM/Hacksung. Original Author lost under thousands of commits.
(If you find it, let me know)

Change-Id: I6f51702bd0047e3182c9640e8fd3f5b912c391a4