Refactor connecting to SAP service and sending messages in queue

Sending and receiving works correctly, however establishing an SAP connection takes too long

TCardEmulator/inc/sap_app.h

@@ -0,0 +1,8 @@
+#ifndef __sap_H__
+#define __sap_H__
+
+#include <nfc.h>
+
+void send_apdu_response(nfc_se_h handle, unsigned char *resp, unsigned int resp_len);
+
+#endif /* __tcardemulator_H__ */