Merge "When wifi ssid is empty, return WifiSsid.NONE"

wifi/java/android/net/wifi/WifiInfo.java

@@ -320,7 +320,8 @@ public class WifiInfo implements Parcelable {
             if (!TextUtils.isEmpty(unicode)) {
                 return "\"" + unicode + "\"";
             } else {
-                return mWifiSsid.getHexString();
+                String hex = mWifiSsid.getHexString();
+                return (hex != null) ? hex : WifiSsid.NONE;
             }
         }
         return WifiSsid.NONE;

wifi/java/android/net/wifi/WifiSsid.java

@@ -205,7 +205,7 @@ public class WifiSsid implements Parcelable {
         for (int i = 0; i < octets.size(); i++) {
             out += String.format(Locale.US, "%02x", ssidbytes[i]);
         }
-        return out;
+        return (octets.size() > 0) ? out : null;
     }
 
     /** Implement the Parcelable interface {@hide} */