Re-order and remove unused Java imports.

webrtc/base/java/src/org/webrtc/Logging.java

 /*
  *  Copyright (c) 2015 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 java.io.PrintWriter;
 import java.io.StringWriter;
 import java.util.EnumSet;
+import java.util.logging.Level;
 import java.util.logging.Logger;
-import java.util.logging.Level;
 
 /** Java wrapper for WebRTC logging. */
 public class Logging {
   private static final Logger fallbackLogger = Logger.getLogger("org.webrtc.Logging");
   private static volatile boolean tracingEnabled;
   private static volatile boolean loggingEnabled;
   private static volatile boolean nativeLibLoaded;
 
   static {
     try {
@@ skipping 150 matching lines @@
     return sw.toString();
   }
 
   private static native void nativeEnableTracing(
       String path, int nativeLevels);
   private static native void nativeEnableLogToDebugOutput(int nativeSeverity);
   private static native void nativeEnableLogThreads();
   private static native void nativeEnableLogTimeStamps();
   private static native void nativeLog(int severity, String tag, String message);
 }