[sensors] [mac] Implement ambient light sensor for macOS

device/generic_sensor/shared/BUILD.gn

Index: device/generic_sensor/shared/BUILD.gn
diff --git a/ash/shared/BUILD.gn b/device/generic_sensor/shared/BUILD.gn
similarity index 63%
copy from ash/shared/BUILD.gn
copy to device/generic_sensor/shared/BUILD.gn
index 3bfae4f1a6ccb54d3df97921e9089212ec3921c6..90114229deba65d3aa9b194af40f5c8a6c454927 100644
--- a/ash/shared/BUILD.gn
+++ b/device/generic_sensor/shared/BUILD.gn
@@ -2,8 +2,10 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("app_types") {
+source_set("shared") {
   sources = [
-    "app_types.h",
+    "device_sensors_consts.h",
+    "device_util_mac.cc",
+    "device_util_mac.h",
   ]
 }