1. fix the bug that ESP32 sends broadcast to phone after smartconfig is done 2. fix the declaration of remote_ip in sc_ack_send_task()
1. TW8657, WIFI send the whole packet to smartconfig; 2. modify API annotation of smartconfig and sniffer; 3. export smartconfig APIs to programming guide;
1. change the original API names. 2. return esp_err_t 3. merge this after updating libsmartconfig.a version v2.6.2