android - Android Facebook FeedDialogBuilder post privacy/audience

Question

I'm trying to allow a user to post there status to their FB wall from with in my Android app. I'm having a problem with the Privacy/Audience for the post is always set to "Only Me" I want to set this to "Friends", but I can't find a way to do this. Below is my code snippet of how i'm accomplishing this:

    Bundle params = new Bundle();
    params.putString("description", " ");
    params.putString("name", "testtest app");
    params.putString("link", "http://www.testtestapp.com/");

    WebDialog feedDialog = (new WebDialog.FeedDialogBuilder(QuickCalc.this, Session.getActiveSession(), params)).setOnCompleteListener(new OnCompleteListener() {

            @Override
            public void onComplete(Bundle values, FacebookException error) {
                if (error == null) {
                    // When the story is posted, echo the success
                    // and the post Id.
                    final String postId = values.getString("post_id");
                    if (postId != null) {
                    } else {
                        // User clicked the Cancel button
                    }
                } else {
                    // Generic, ex: network error
                }
            }

        })
        .build();
    feedDialog.show();