[led] check know wifi

wifi_manager.py

@@ -231,7 +231,10 @@ def check_known_wifi(scan_wifi_list):
     while known_wifi_exist:
         logging.info(f"Known Wi-Fi exist, wait for connecting...")
         connected, _ = check_wifi_connection()
+        if led_enabled:
+                orangepi.set_led_on('green')
         if connected:
+            orangepi.set_led_off('green')
             break
     return True