gistfile1.java

    //use this builder instead  NotificationCompat.BigPictureStyle (also use standard Notification not compat)
    
    static class MyPictureBuilder extends Notification.BigPictureStyle{
        @NonNull
        @Override
        protected RemoteViews getStandardView(int layoutId) {
            RemoteViews ret =  super.getStandardView(layoutId);
            int id =  Resources.getSystem().getIdentifier("text", "id", "android");
            ret.setBoolean(id, "setSingleLine", false);
            ret.setInt(id, "setLines", 4);
            return ret;
        }
    }