[net] Move checks from GetLocalAddrForPeer to caller

GetLocalAddrForPeer() is only called in one place. The checks inside that
function make more sense to be carried out be the caller:

- fSuccessfullyConnected is already checked at the top of
  SendMessages(), so must be true when we call GetLocalAddrForPeer()
- fListen can go into the conditional before GetLocalAddrForPeer() is
  called.

src/net_processing.cpp

@@ -4416,7 +4416,9 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
         // Address refresh broadcast
         auto current_time = GetTime<std::chrono::microseconds>();
 
-        if (pto->RelayAddrsWithConn() && !::ChainstateActive().IsInitialBlockDownload() && pto->m_next_local_addr_send < current_time) {
+        if (fListen && pto->RelayAddrsWithConn() &&
+            !::ChainstateActive().IsInitialBlockDownload() &&
+            pto->m_next_local_addr_send < current_time) {
             // If we've sent before, clear the bloom filter for the peer, so that our
             // self-announcement will actually go out.
             // This might be unnecessary if the bloom filter has already rolled