Update NetworkManager.java

I tried to use Ethernet link to my Android tablet using this cable

http://www.amazon.co.uk/Smays-Micro-USB-Ethernet-Computer-Notebook/dp/B009XU6N54

I noticed my app returned Network = None.

So I added this little patch so the app now works over Ethernet link.

src/android/NetworkManager.java

@@ -45,6 +45,7 @@ public class NetworkManager extends CordovaPlugin {
 
     public static final String WIFI = "wifi";
     public static final String WIMAX = "wimax";
+    public static final String ETHERNET = "ethernet";
     // mobile
     public static final String MOBILE = "mobile";
 
@@ -240,6 +241,9 @@ private String getType(NetworkInfo info) {
             if (type.equals(WIFI)) {
                 return TYPE_WIFI;
             }
+            else if (type.toLowerCase().equals(ETHERNET)) {
+                return TYPE_ETHERNET;
+            }
             else if (type.equals(MOBILE) || type.equals(CELLULAR)) {
                 type = info.getSubtypeName();
                 if (type.equals(GSM) ||