SystemUI: Check current data subscription when updating signal cluster

* Checking connected and data state is insufficient when updating the
  signal cluster, for multi-SIM use we need to check whether the current
  signal controller has the data subscription as well, otherwise it's
  possible for both clusters to display the data tech simultaneously.

REF: KIPPER-702
Change-Id: I1dd2994271df2c42deb8e9aeb7c01798a6cfd2ca

Author: intervigilium

packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java

@@ -395,7 +395,8 @@ private final void updateTelephony() {
             mCurrentState.iconGroup = mDefaultIcons;
         }
         mCurrentState.dataConnected = mCurrentState.connected
-                && mDataState == TelephonyManager.DATA_CONNECTED;
+                && mDataState == TelephonyManager.DATA_CONNECTED
+                && mCurrentState.dataSim;
 
         mCurrentState.showSeparateRoaming = false;
         if (isCarrierNetworkChangeActive()) {