Bluetooth: Add new auto_conn value matching mgmt action 0x00

The 0x00 action value of mgmt means "scan and report" but do not
connect. This is different from HCI_AUTO_CONN_DISABLED so we need a new
value for it.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>