Clarify steps to test WiFi access point

Since the current test case uses several customizations to target device,
add additional clarifications and checks to ensure the system is properly
setup.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

test-cases/wifi-wpa3-transition-mode-accesspoint-setup.yaml

@@ -113,8 +113,11 @@ run:
         connmanctl>
     - "After the connection has been established, reboot the access point by
       pressing the reboot button on the target device. Then, on the target device,
-      restart the 'hostapd' daemon and 'systemd-networkd' service, by running:"
+      restart the 'systemd-networkd' service, confirm that the wifi interface is up
+      by listing the connman technologies and finally restart 'hostapd' daemon,
+      by running:"
     - "$ sudo systemctl restart systemd-networkd"
+    - "$ sudo connmanctl technologies"
     - "$ sudo systemctl restart hostapd"
     - "On the SDK, reconnect to 'APERTIS_AP' by re-running the previous
       'connmanctl' commands."