[Provider Model] Connect carrier network issue fix

- Need to check if the data is enabled on the second SIM in the case of
dual SIM.

Bug: 177411771
Test: manual test
Change-Id: Ieead7a4550628d5380b8d0150cfd7a67c47980ca

src/com/android/settings/network/SubscriptionsPreferenceController.java

@@ -498,7 +498,7 @@ public class SubscriptionsPreferenceController extends AbstractPreferenceControl
 
     @VisibleForTesting
     public void connectCarrierNetwork() {
-        if (mTelephonyManager == null || !mTelephonyManager.isDataEnabled()) {
+        if (!MobileNetworkUtils.isMobileDataEnabled(mContext)) {
             return;
         }
         if (mWifiPickerTrackerHelper != null) {