Move Java Blimp shell code to app subpackage

blimp/client/app/android/java/res/layout/blimp_main.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2015 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. -->
 
 <merge xmlns:android="http://schemas.android.com/apk/res/android">
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical">
         <!-- Toolbar -->
-        <org.chromium.blimp.toolbar.Toolbar
+        <org.chromium.blimp.app.toolbar.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="56dp"
             android:layout_alignParentTop="true"
             android:paddingStart="5dp"
             android:orientation="horizontal"
             android:gravity="center"
             android:background="#f2f2f2">
-            <org.chromium.blimp.toolbar.UrlBar
+            <org.chromium.blimp.app.toolbar.UrlBar
                 android:id="@+id/toolbar_url_bar"
                 android:layout_width="0dp"
                 android:layout_height="48dp"
                 android:layout_weight="1"
                 android:paddingStart="10dp"
                 android:paddingEnd="10dp"
                 android:singleLine="true"
                 android:maxLines="1"
                 android:selectAllOnFocus="true"
                 android:inputType="textUri"
@@ skipping 14 matching lines @@
                 android:scaleType="center"
                 android:src="@drawable/btn_reload" />
             <ImageButton
                 android:id="@+id/menu_button"
                 android:layout_width="wrap_content"
                 android:layout_height="48dp"
                 android:paddingEnd="4dp"
                 android:layout_gravity="center"
                 android:background="@null"
                 android:src="@drawable/btn_menu" />
-        </org.chromium.blimp.toolbar.Toolbar>
-        
+        </org.chromium.blimp.app.toolbar.Toolbar>
+
         <!-- Content Area -->
-        <org.chromium.blimp.BlimpView
+        <org.chromium.blimp.app.BlimpContentsDisplay
             android:id="@+id/renderer"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_below="@+id/toolbar"/>
 
         <include android:id="@+id/debug_stats"
             layout="@layout/debug_stats_overlay"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignParentBottom="true"
             android:visibility="invisible" />
 
     </RelativeLayout>
-</merge>
+</merge>