[sensors] [mac] Fix ambient light sensor not updating its value when closing the lid with a monitor…

device/generic_sensor/platform_sensor_ambient_light_mac.cc

Index: device/generic_sensor/platform_sensor_ambient_light_mac.cc
diff --git a/device/generic_sensor/platform_sensor_ambient_light_mac.cc b/device/generic_sensor/platform_sensor_ambient_light_mac.cc
index d83114c3ac3d3dbb8b174ccd66d6619b604c1335..e96299e4db013927a9c1121e1aaf261c6e8aa5d9 100644
--- a/device/generic_sensor/platform_sensor_ambient_light_mac.cc
+++ b/device/generic_sensor/platform_sensor_ambient_light_mac.cc
@@ -94,6 +94,13 @@ bool PlatformSensorAmbientLightMac::StartSensor(
   if (kr != KERN_SUCCESS)
     return false;
 
+  kr = IOServiceAddInterestNotification(
+      light_sensor_port_.get(), light_sensor_service_, kIOBusyInterest,
+      IOServiceCallback, this,
+      light_sensor_busy_notification_.InitializeInto());
+  if (kr != KERN_SUCCESS)
+    return false;
+
   kr = IOServiceOpen(light_sensor_service_, mach_task_self(), 0,
                      light_sensor_object_.InitializeInto());
   if (kr != KERN_SUCCESS)
@@ -109,6 +116,7 @@ bool PlatformSensorAmbientLightMac::StartSensor(
 void PlatformSensorAmbientLightMac::StopSensor() {
   light_sensor_port_.reset();
   light_sensor_notification_.reset();
+  light_sensor_busy_notification_.reset();
   light_sensor_object_.reset();
   light_sensor_service_.reset();
   current_lux_ = 0.0;