[system][bt] fix -Wreorder-init-list again

bool DynamicChannelManager::ConnectChannel(hci::Address device, Psm psm, OnConnectionOpenCallback on_connection_open,

                                           OnConnectionFailureCallback on_fail_callback, os::Handler* handler) {

  internal::LinkManager::PendingDynamicChannelConnection pending_dynamic_channel_connection{

      .handler_ = handler,

      .on_open_callback_ = std::move(on_connection_open),

      .on_fail_callback_ = std::move(on_fail_callback),

      .handler_ = handler};

  };

  l2cap_layer_handler_->Post(common::BindOnce(&internal::LinkManager::ConnectDynamicChannelServices,

                                              common::Unretained(link_manager_), device,

                                              std::move(pending_dynamic_channel_connection), psm));