Move Java Blimp shell code to app subpackage

blimp/client/app/android/java/src/org/chromium/blimp/app/session/EngineInfo.java

 // Copyright 2016 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.blimp.session;
+package org.chromium.blimp.app.session;
 
 /**
  * Stores the information about the engine.
  */
 public class EngineInfo {
     public final String ipAddress;
     public final String engineVersion;
     public final String assignerUrl;
     private boolean mConnected;
 
     public EngineInfo(String ip, String version, String assigner) {
         ipAddress = ip;
         engineVersion = version;
         assignerUrl = assigner;
     }
 
     public boolean isConnected() {
         return mConnected;
     }
 
     public void setConnected(boolean connected) {
         this.mConnected = connected;
     }
 }