In IMS conference, use participants' Handle to check if it's host.

Earlier the check was done on Endpoint which was not correct.

Bug: 24613146
Change-Id: Iaefa1a59b9e762805e2ca342162a51170621f2b2
diff --git a/src/com/android/services/telephony/ImsConference.java b/src/com/android/services/telephony/ImsConference.java
index b911105..2654ad7 100644
--- a/src/com/android/services/telephony/ImsConference.java
+++ b/src/com/android/services/telephony/ImsConference.java
@@ -647,7 +647,7 @@
                 if (!mConferenceParticipantConnections.containsKey(userEntity)) {
                     // Some carriers will also include the conference host in the CEP.  We will
                     // filter that out here.
-                    if (!isParticipantHost(mConferenceHostAddress, userEntity)) {
+                    if (!isParticipantHost(mConferenceHostAddress, participant.getHandle())) {
                         createConferenceParticipantConnection(parent, participant);
                         newParticipants.add(participant);
                         newParticipantsAdded = true;