Revert "Disable old Telephony updates"

This reverts commit af330381ff137febfc17a99cac035736ec51d00d.

Change-Id: Idfaec1849dd1043252a9618233d016cd84ba951b
diff --git a/src/com/android/phone/CallModeler.java b/src/com/android/phone/CallModeler.java
index edf0656..3e37f29 100644
--- a/src/com/android/phone/CallModeler.java
+++ b/src/com/android/phone/CallModeler.java
@@ -132,12 +132,9 @@
     public void addListener(Listener listener) {
         Preconditions.checkNotNull(listener);
         Preconditions.checkNotNull(mListeners);
-        // Disable updates to avoid interference between Telecomm and Telephony.
-        /*
         if (!mListeners.contains(listener)) {
             mListeners.add(listener);
         }
-        */
     }
 
     public List<Call> getFullList() {