Function build_aprs_mice_with_message_packet 

pub fn build_aprs_mice_with_message_packet(
    source: &Ax25Address,
    latitude: f64,
    longitude: f64,
    speed_knots: u16,
    course_deg: u16,
    message: MiceMessage,
    symbol_table: char,
    symbol_code: char,
    comment: &str,
    path: &[Ax25Address],
) -> Ax25Packet

Like build_aprs_mice_with_message but returns the unencoded [Ax25Packet] for callers that want to inspect or route it.