Fix various issues found when testing Mms.

Fix some race conditions (check isTeardownRequested).
Fix the passing of mInterfaceName to subtypes (mms, etc).
Fix the generation of CONNECTED message to already active subtypes.
Fix the enabling of Data in DataConnectionTracker.

bug: 2065037

services/java/com/android/server/ConnectivityService.java

@@ -513,7 +513,8 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                     mNetRequestersPids[usedNetworkType].add(currentPid);
                 }
 
-                if (ni.isConnectedOrConnecting() == true) {
+                if ((ni.isConnectedOrConnecting() == true) &&
+                        !network.isTeardownRequested()) {
                     if (ni.isConnected() == true) {
                         // add the pid-specific dns
                         handleDnsConfigurationChange();
@@ -686,6 +687,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                 ++numConnectedNets;
             }
         }
+        if (DBG) Log.d(TAG, "numConnectedNets returning "+numConnectedNets);
         return numConnectedNets;
     }
 
@@ -792,7 +794,8 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                 if (newNet.isAvailable()) {
                     NetworkInfo switchTo = newNet.getNetworkInfo();
                     switchTo.setFailover(true);
-                    if (!switchTo.isConnectedOrConnecting()) {
+                    if (!switchTo.isConnectedOrConnecting() ||
+                            newNet.isTeardownRequested()) {
                         newNet.reconnect();
                     }
                     if (DBG) {