ProcessPendingMessagesAction works based on subscriptions

PorcessPendingMessagesAction queues one message for sending/downloading
associated with a subscription triggering current action at a time. And
the ConnectivityUtil also works based on subscriptions so that pending
messages can be processed regardless of other phones' state in multi-sim
case.

It includes cleanup code as well.

Test: Manual

Change-Id: Id6b4f4a0aa6a3291e7a4d8a5d3f0fbb9db3c5b86
Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>

tests/src/com/android/messaging/datamodel/action/ActionServiceTest.java

@@ -35,7 +35,6 @@ import com.android.messaging.datamodel.action.ActionMonitor.ActionCompletedListe
 import com.android.messaging.datamodel.action.ActionMonitor.ActionStateChangedListener;
 import com.android.messaging.datamodel.action.ActionTestHelpers.ResultTracker;
 import com.android.messaging.datamodel.action.ActionTestHelpers.StubBackgroundWorker;
-import com.android.messaging.datamodel.action.ActionTestHelpers.StubConnectivityUtil;
 import com.android.messaging.datamodel.action.ActionTestHelpers.StubLoader;
 
 import java.util.ArrayList;
@@ -145,8 +144,7 @@ public class ActionServiceTest extends BugleServiceTestCase<ActionServiceImpl>
         FakeFactory.registerWithFakeContext(getContext(),mContext)
                 .withDataModel(new FakeDataModel(mContext)
                 .withBackgroundWorkerForActionService(mWorker)
-                .withActionService(new ActionService())
-                .withConnectivityUtil(new StubConnectivityUtil(mContext)));
+                .withActionService(new ActionService()));
 
         mStates = new ArrayList<Integer>();
         setContext(Factory.get().getApplicationContext());