Moves android specific code into android directory

shell/android/apk/src/org/chromium/mojo_shell_apk/MojoMain.java

 // 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 org.chromium.mojo_shell_apk;
 
 import android.content.Context;
 import android.util.Log;
 
 import org.chromium.base.JNINamespace;
 
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 /**
  * A placeholder class to call native functions.
  **/
-@JNINamespace("mojo")
+@JNINamespace("mojo::shell")
 public class MojoMain {
     private static final String TAG = "MojoMain";
 
     // Directory where applications bundled with the shell will be extracted.
     private static final String LOCAL_APP_DIRECTORY = "local_apps";
     // Individual applications bundled with the shell as assets.
     private static final String NETWORK_LIBRARY_APP = "network_service.mojo";
     // The mojo_shell library is also an executable run in forked processes when running
     // multi-process.
     private static final String MOJO_SHELL_EXECUTABLE = "libmojo_shell.so";
@@ skipping 55 matching lines @@
     /**
      * Initializes the native system. This API should be called only once per process.
      **/
     private static native void nativeInit(Context context, String mojoShellPath,
             String[] parameters,
             String bundledAppsDirectory);
 
     private static native void nativeStart(String appUrl);
 
 }