Merge "Drop packets in-flight after disconnection"

  uint16_t local_handle =

      connections_.GetHandleOnlyAddress(incoming.GetSourceAddress());

  if (local_handle == kReservedHandle) {

      LOG_INFO("Dropping packet since connection does not exist");

      return;

  }

  std::vector<uint8_t> payload_data(acl_view.GetPayload().begin(),

                                    acl_view.GetPayload().end());

  uint16_t acl_buffer_size = properties_.acl_data_packet_length;