Re-order and remove unused Java imports.

webrtc/api/androidtests/src/org/webrtc/PeerConnectionTest.java

 /*
  *  Copyright 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 package org.webrtc;
 
-import org.webrtc.Metrics;
 import org.webrtc.Metrics.HistogramInfo;
 import org.webrtc.PeerConnection.IceConnectionState;
 import org.webrtc.PeerConnection.IceGatheringState;
 import org.webrtc.PeerConnection.SignalingState;
 
+import android.test.ActivityTestCase;
 import android.test.suitebuilder.annotation.MediumTest;
 
 import java.io.File;
 import java.lang.ref.WeakReference;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.IdentityHashMap;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.HashSet;
 import java.util.Map;
 import java.util.TreeSet;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
 /** End-to-end tests for PeerConnection.java. */
-import android.test.ActivityTestCase;
-
 public class PeerConnectionTest extends ActivityTestCase {
   private static final int TIMEOUT_SECONDS = 20;
   private TreeSet<String> threadsBeforeTest = null;
 
   @Override
   protected void setUp() {
     assertTrue(PeerConnectionFactory.initializeAndroidGlobals(
         getInstrumentation().getContext(), true, true, true));
   }
 
@@ skipping 1021 matching lines @@
     TreeSet<String> threads = new TreeSet<String>();
     // This pokes at /proc instead of using the Java APIs because we're also
     // looking for libjingle/webrtc native threads, most of which won't have
     // attached to the JVM.
     for (String threadId : (new File("/proc/self/task")).list()) {
       threads.add(threadId);
     }
     return threads;
   }
 }