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

testing/android/native_test_apk.xml

Index: testing/android/native_test_apk.xml
diff --git a/testing/android/native_test_apk.xml b/testing/android/native_test_apk.xml
index 41838d246b04d93d8049141501fae85bd87dc8e4..02b1590d7bd8655915e9bcc74eed915dff36e9a1 100644
--- a/testing/android/native_test_apk.xml
+++ b/testing/android/native_test_apk.xml
@@ -15,11 +15,6 @@ found in the LICENSE file.
   <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}"/>
@@ -47,8 +42,9 @@ found in the LICENSE file.
 
   <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" />