Bluetooth: mgmt: Fix refresh cached connection info

Set the connection data before calling get_conn_info_sync, so it can be
verified the connection is still connected, before refreshing cached
values.

Fixes: 47db6b42 ("Bluetooth: hci_sync: Convert MGMT_OP_GET_CONN_INFO")
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>