CTAP-HID abort and cancellation

[nmdanny]

• Both CTAPHID_CANCEL and CTAPHID_INIT(when busy) messages are treated the same
  

  softauth/src/hid/packet_processing.rs

  Lines 202 to 207 in b0b8677

  	if [Ok(CommandType::Init), Ok(CommandType::Cancel)]
  	.contains(&init.get_command_type())
  	{
  	// TODO: difference between abort and init
  	self.abort_transaction();
  	Ok(PacketProcessingResult::Aborted)

  Need to figure out what's the difference(if any)

• Propagate cancellation to CTAP2 message processing

  • Propagate to UI once it is implemented