@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setHasOptionsMenu(true);
    }
Configure the toolbar anyway you like here. Default is to set it as the activity's
main action bar. Override if you already provide an action bar.
Not called if no toolbar was found.

@param toolbar from layout with id "picker_toolbar"
android/modules/module_filepicker/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java