Notify the Navigator to display the card's window.
BPS_API int navigator_card_send_card_ready(void)
The navigator_card_send_card_ready() function notifies the navigator that the card is ready to be shown. If this function is called without first requesting for Navigator to notify the card when its window is about to be shown (via navigator_card_request_card_ready_check()), then the behaviour is undefined.
BPS_SUCCESS upon success, BPS_FAILURE with errno set otherwise.