Add 'blank_screen' util.
This can be transitioned to by init to shutdown the
screen thereby preventing init from either depending
on binder or accessing halified sysnodes directly.
Bug: 70846424
Test: manual + init use
Change-Id: I86893ee5d7118547cd073297c0626e474f366b82
diff --git a/light/utils/blank_screen.rc b/light/utils/blank_screen.rc
new file mode 100644
index 0000000..735551c
--- /dev/null
+++ b/light/utils/blank_screen.rc
@@ -0,0 +1,5 @@
+service blank_screen /system/bin/blank_screen
+ user system
+ oneshot
+ group system readproc
+ shutdown critical