fix the false wifi 'CONNECTED' broadcast

WifiStatemachine should use 'WifiSsid.NONE' instead of 'null' to judge the return
value of WifiInfo#getSSID() which will never be 'null'. Otherwise it will send a
false 'CONNECTED' broadcast first then 'DISCONNECTED' broadcast when we disable
wifi from System Setting GUI.

Change-Id: I9682a69cc3acad1a90d1b4fe96d53d3a28cf8277
1 file changed
tree: 2f70256c587cec4274d9153f79ed0ef8d605cad9
  1. service/