Unhiding MSIM APIs.

1. Unhide MSIM APIs in TelephonyManager that already have non-MSIM equivalent
   APIs public.
2. Make MSIM API naming consistent (overloaded, no suffix).
3. Unhide APIs in SubscriptionManager that are necessary for MSIM.

Bug: 26772894
Change-Id: Ibebab7379ea79c8e4812bbd190342827048e30e2
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 7cb086f..92c721b 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -1611,7 +1611,7 @@
         if (b != null) {
             try {
                 ITelephony it = ITelephony.Stub.asInterface(b);
-                int subId = SubscriptionManager.getDefaultDataSubId();
+                int subId = SubscriptionManager.getDefaultDataSubscriptionId();
                 Log.d("ConnectivityManager", "getMobileDataEnabled()+ subId=" + subId);
                 boolean retVal = it.getDataEnabled(subId);
                 Log.d("ConnectivityManager", "getMobileDataEnabled()- subId=" + subId