Multi-SIM support for getting carrier config.

Add multi-SIM support for getting carrier config directly from
PhoneGlobals. This is for use within com.android.phone.

Bug: 20270007
Change-Id: Ib09d5222debbf9308564429f2afdec851f165ab4
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index b931340..9f14a93 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -511,7 +511,11 @@
     }
 
     /* package */ Bundle getCarrierConfig() {
-        return configLoader.getConfigForSubId(SubscriptionManager.getDefaultSubId());
+        return getCarrierConfigForSubId(SubscriptionManager.getDefaultSubId());
+    }
+
+    /* package */ Bundle getCarrierConfigForSubId(int subId) {
+        return configLoader.getConfigForSubId(subId);
     }
 
     /**