WifiManager: handle failed state change (#37205)

* handle connecting to network that drops out w/ wrong password (no longer says connected and now deletes connection)

* clean up

* combine

system/ui/lib/networkmanager.py

@@ -11,6 +11,7 @@ class NMDeviceState(IntEnum):
   IP_CONFIG = 70
   ACTIVATED = 100
   DEACTIVATING = 110
+  FAILED = 120
 
 
 # NetworkManager constants
@@ -29,6 +30,7 @@ NM_IP4_CONFIG_IFACE = 'org.freedesktop.NetworkManager.IP4Config'
 
 NM_DEVICE_TYPE_WIFI = 2
 NM_DEVICE_TYPE_MODEM = 8
+NM_DEVICE_STATE_REASON_NO_SECRETS = 7
 NM_DEVICE_STATE_REASON_SUPPLICANT_DISCONNECT = 8
 NM_DEVICE_STATE_REASON_NEW_ACTIVATION = 60