Revert "Stops ImageWallpaper Thread when phone is idle"

This reverts commit c5e0476b46cba2739604078c60842bb6d0bb036b.

Reason for revert: breaks wakeup

Bug: 185681677
Change-Id: I61b12a006415bfd406e8f54db1bc0fe459e1ec0f
1 file changed