Add lazy service target to the light HAL

This change allows a device to include the lazy service implementation,
which will allow the HAL to exit when it is not in use.

Test: Manually observe brightness slider behavior
Change-Id: I7f8f747ebe6e183e1aaf1406852e6e26a97aee35
diff --git a/light/2.0/default/android.hardware.light@2.0-service-lazy.rc b/light/2.0/default/android.hardware.light@2.0-service-lazy.rc
new file mode 100644
index 0000000..8a3a59c
--- /dev/null
+++ b/light/2.0/default/android.hardware.light@2.0-service-lazy.rc
@@ -0,0 +1,9 @@
+service vendor.light-hal-2-0 /vendor/bin/hw/android.hardware.light@2.0-service-lazy
+    interface android.hardware.light@2.0::ILight default
+    oneshot
+    disabled
+    class hal
+    user system
+    group system
+    # shutting off lights while powering-off
+    shutdown critical