Package and load native library in content shell. Add content shell util scripts.

testing/android/native_test_apk.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 Copyright (c) 2012 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.
 -->
 
 <project name="replaceme" default="debug" basedir=".">
 
   <description>
     Building native test runner ChromeNativeTests_replaceme.apk
   </description>
 
   <property environment="env"/>
   <property name="sdk.dir" location="${env.ANDROID_SDK_ROOT}"/>
   <property name="sdk.version" value="${env.ANDROID_SDK_VERSION}"/>
   <property name="src" location="."/>
-
-  <!-- TODO(jrg): although the source.dir setting points the android
-  antfiles to the correct location for finding our java, and our jars
-  are rebuilt when the java changes, a re-javac does not trigger a
-  re-package of our apk.  Fix.  -->
   <property name="source.dir" location="java"/>
 
   <property name="target" value="android-${env.ANDROID_SDK_VERSION}"/>
 
   <condition property="location.base" 
              value="${sdk.dir}" 
              else="${sdk.dir}/platforms/android-${sdk.version}">
     <isset property="env.ANDROID_BUILD_TOP"/>
   </condition>
 
   <!-- We expect PRODUCT_DIR to be set like the gyp var
        (e.g. $ROOT/out/Debug) -->
   <!-- TODO(jrg): ideally we need this to run before -build-setup, where
        directories are made based on this variable. -->
   <target name="-pre-build">
     <if>
       <condition>
         <isset property="PRODUCT_DIR" />
       </condition>
       <else>
         <fail message="PRODUCT_DIR env var not set?" />
       </else>
     </if>
   </target>
 
   <property name="out.dir" location="${PRODUCT_DIR}/replaceme_apk"/>
 
-  <!-- TODO(jrg): should I make this directory specific to the apk? -->
+  <property name="resource.absolute.dir" value="res"/>
   <property name="gen.absolute.dir" value="${out.dir}/gen"/>
+  <property name="jar.libs.dir" value="${out.dir}/java/libs"/>
 
   <import file="${sdk.dir}/tools/ant/build.xml" />
 
 </project>