light service: mark as shutdown critical
Required because the lights need to be turned off late in boot
(e.x. during fsck for disk health), and before, blank_screen
accessing light encountered a race condition where if it didn't
get scheduled before all of the processes which were getting
shutdown were getting killed, the screen wouldn't blank.
Bug: 74976325
Test: adjusting brightness continues to work
Test: screen blanks during shutdown at the correct time
including when an artificial 5s delay is inserted when
the phone normally fscks (which can also be quick)
Change-Id: I57ebc11d7ecf57ee327c681455712f4b53de6fd3
diff --git a/light/2.0/default/android.hardware.light@2.0-service.rc b/light/2.0/default/android.hardware.light@2.0-service.rc
index 68f74c4..b54ca95 100644
--- a/light/2.0/default/android.hardware.light@2.0-service.rc
+++ b/light/2.0/default/android.hardware.light@2.0-service.rc
@@ -3,3 +3,5 @@
class hal
user system
group system
+ # shutting off lights while powering-off
+ shutdown critical