Wifi: Fix for connection failure between third client and GC.

When third device sends a connection request to the group client, the existing connection is terminating and also the ongoing connection not successful.Currently as there is  no use case where third device is connecting to GC,and the existing onnection getting terminated.This is addressed by ignoring the new connection request from third client to GC and the existing connection is intact.
CRs-Fixed: 467049

Change-Id: I784c38b9a4ca0c60b188b9697e3b4af4d09053cc