Updated copyright notice and cleaned up includes.

[ Merge of http://go/wvgerrit/137810 ]

Bug: 204946540
Test: Metric unit tests
Change-Id: I78f839fafd27604a2bb78c04d587c40919c5372d

libwvdrmengine/cdm/metrics/src/attribute_handler.cpp

@@ -1,15 +1,18 @@
-// Copyright 2018 Google Inc. All Rights Reserved.
+// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
 //
 // This file contains implementations for the AttributeHandler.
 
 #include "attribute_handler.h"
+
 #include "OEMCryptoCENC.h"
+#include "field_tuples.h"
 #include "pow2bucket.h"
 #include "wv_cdm_types.h"
 
 namespace wvcdm {
 namespace metrics {
-
 //
 // Specializations for setting attribute fields.
 //
@@ -106,6 +109,5 @@ void SetAttributeField<drm_metrics::Attributes::kErrorCodeFieldNumber, int>(
     const int& cdm_error, drm_metrics::Attributes* attributes) {
   attributes->set_error_code(cdm_error);
 }
-
 }  // namespace metrics
 }  // namespace wvcdm