Selects a active sim to MobileNetworkActivity w/o subscription ID input

Bug:194754151
Test: Sanity test with test build. See b/194754151#21

Change-Id: Ic3449392a7f564b69c3f42cc762ec4c9ec642797

src/com/android/settings/network/telephony/MobileNetworkActivity.java

@@ -257,6 +257,7 @@ public class MobileNetworkActivity extends SettingsBaseActivity
         if (currentSubInfo == null) {
             currentSubInfo = subList.stream()
                     .filter(SubscriptionAnnotation::isDisplayAllowed)
+                    .filter(SubscriptionAnnotation::isActive)
                     .findFirst().orElse(null);
         }
         return (currentSubInfo == null) ? null : currentSubInfo.getSubInfo();