resources/src/main/java/org/robolectric/res/android/CppAssetManager2.java
Asset Open(final String filename, ApkAssetsCookie cookie,
      Asset.AccessMode mode) {
    final String new_path = "assets/" + filename;
    return OpenNonAsset(new_path, cookie, mode);
  }
Asset Open(final String filename, ApkAssetsCookie cookie,
      Asset.AccessMode mode) {
    final String new_path = "assets/" + filename;
    return OpenNonAsset(new_path, cookie, mode);
  }
Asset.AccessMode mode);