[Cellular] Hide technology badge when network is not connected.

This CL updates network icon in OS Settings so that they don't show
cellular technology badge when the network is not connected. This
makes it consistent with Quick Settings menu.

Bug: 1122137
Change-Id: Iae972215c456ff884f26761174a5d80b1568864f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2380580Reviewed-by: Jon Mann <jonmann@chromium.org>
Commit-Queue: Azeem Arshad <azeemarshad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802432}

ui/webui/resources/cr_components/chromeos/network/network_icon.js

@@ -216,7 +216,12 @@ Polymer({
    * @private
    */
   showTechnology_() {
-    return this.getTechnology_() !== '' && this.showTechnologyBadge;
+    if (!this.networkState) {
+      return false;
+    }
+    return OncMojo.connectionStateIsConnected(
+               this.networkState.connectionState) &&
+        this.getTechnology_() !== '' && this.showTechnologyBadge;
   },
 
   /**