[Checkstyle] Fix misc style issues in Java files.

build/android/tests/multiple_proguards/src/dummy/DummyActivity.java

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package dummy;
 
 import android.app.Activity;
 
 /**
  * Dummy activity to build apk.
  *
  * This class is created to ensure that proguard will produce two separate warnings.
  */
 public class DummyActivity extends Activity {
     private static void doBadThings1() {
         try {
             sun.misc.Unsafe.getUnsafe();
         } catch (Exception e) {
             throw new Error(e);
         }
     }
 
     private static void doBadThings2() {
         sun.reflect.Reflection.getCallerClass(2);
   }
 }