[Android] Use the build-generated list of libraries for gtest APKs

content/public/android/java/templates/NativeLibraries.template

 // 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.content.app;
 
 public class NativeLibraries {
     // This is the list of native libraries to be loaded (in the correct order)
     // by LibraryLoader.java.  The content java library is compiled with no
     // array defined, and then the build system creates a version of the file
     // with the real list of libraries required (which changes based upon which
     // .apk is being built).
-    static String[] libraries
+    // TODO(cjhopman): This is public since it is referenced by ChromeNativeTestActivity.java
+    // directly. The two ways of library loading should be refactored into one.
+    public static String[] libraries
 #include <native_libraries_array.h>
       ;
 }