Don't send ACK to modem for a 2nd close request

For the case the modem sends a close request for
the same connection handle do not process the
request and do not ACK to the modem

CRs-fixed: 2269123

Change-Id: I027c3e79965bb0f9ab311093904e6dded1aa5d03

gnss/Agps.cpp

@@ -599,7 +599,6 @@ void AgpsManager::releaseATL(int connHandle){
     if (sm == NULL) {
         LOC_LOGE("Subscriber with connHandle %d not found in any SM",
                     connHandle);
-        mAtlCloseStatusCb(connHandle, 0);
         return;
     }