[Android] Incorporate findbugs into android builds.

components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/PeerConnectionObserverMock.java

 // Copyright 2014 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 org.chromium.components.devtools_bridge;
 
+import org.chromium.base.annotations.SuppressFBWarnings;
+
 import java.util.concurrent.CountDownLatch;
 
 /**
  * Mock for AbstractPeerConnection.Observer.
  */
+@SuppressFBWarnings("URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
 public class PeerConnectionObserverMock implements AbstractPeerConnection.Observer {
     public AbstractPeerConnection.SessionDescriptionType localDescriptionType;
     public String localDescription;
 
     public final CountDownLatch localDescriptionAvailable = new CountDownLatch(1);
     public final CountDownLatch failureAvailable = new CountDownLatch(1);
     public final CountDownLatch remoteDescriptionSet = new CountDownLatch(1);
     public final CountDownLatch connected = new CountDownLatch(1);
 
     public AbstractPeerConnection iceCandidatesSink;
@@ skipping 20 matching lines @@
     public void onIceCandidate(String iceCandidate) {
         if (iceCandidatesSink != null)
             iceCandidatesSink.addIceCandidate(iceCandidate);
     }
 
     @Override
     public void onIceConnectionChange(boolean connected) {
         this.connected.countDown();
     }
 }