Fix badge update logic for cellular network icon.

Bug: 776236
Change-Id: I41f84b07f6ebd28434897bb77edcc9254987ec1b
Reviewed-on: https://chromium-review.googlesource.com/727024Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510136}

ash/system/network/network_icon.cc

@@ -540,7 +540,7 @@ bool NetworkIconImpl::UpdateWirelessStrengthIndex(const NetworkState* network) {
 bool NetworkIconImpl::UpdateCellularState(const NetworkState* network) {
   bool dirty = false;
   const Badge technology_badge = BadgeForNetworkTechnology(network, icon_type_);
-  if (technology_badge == technology_badge_) {
+  if (technology_badge != technology_badge_) {
     technology_badge_ = technology_badge;
     dirty = true;
   }