IMS: Merge calls option not seen when refer failed

Recalculate the conferenceable connections once conference call
is started. This will ensure conferenceable connections are updated
correctly even when refer failed for one of the calls.

BUG=24537276
Change-Id: I40355fbb6fb7d82edd48b5ebb3bdb6b6b09406bf
diff --git a/src/com/android/services/telephony/ImsConferenceController.java b/src/com/android/services/telephony/ImsConferenceController.java
index a7e2242..c0533c1 100644
--- a/src/com/android/services/telephony/ImsConferenceController.java
+++ b/src/com/android/services/telephony/ImsConferenceController.java
@@ -75,7 +75,7 @@
         @Override
         public void onConferenceStarted() {
             Log.v(this, "onConferenceStarted");
-            recalculateConference();
+            recalculate();
         }
     };