Make copyright headers consistent with Google template; remove "(C)"

Test: Comment changes only; still compiles...
Change-Id: Id699a8170112f06e4a2c9f2e0f0834d1817ace4e
diff --git a/system/osi/src/metrics.cc b/system/osi/src/metrics.cc
index f31bf4e..53cf4d2 100644
--- a/system/osi/src/metrics.cc
+++ b/system/osi/src/metrics.cc
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- *  Copyright (C) 2016 Google, Inc.
+ *  Copyright 2016 Google, Inc.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.