libsuspend: always unblock early suspend

SurfaceFlinger and PowerManagerService manage their synchronization
without the help of early suspend, and SurfaceFlinger no longer unblocks
early suspend.  Add a new thread when early suspend is detected that will
immediately unblock early suspend.

Change-Id: I87ef4984a2ab34cbbb3af8b7762236b9a92dc2ea
1 file changed