wifi: send pending messages on getting connected

Each time we get a socket to a peer, try sending all pending wifi direct
messages. It's a hack, but trying to send isn't that expensive and the
experience is much improved.

xwords4/android/XWords4/src/org/eehouse/android/xw4/WiDirService.java

@@ -685,6 +685,10 @@ public class WiDirService extends XWService {
             DbgUtils.logd( TAG,
                            "storeByAddress(); storing wrap for %s",
                            macAddress );
+
+            GameUtils.resendAllIf( XWApp.getContext(),
+                                   CommsConnType.COMMS_CONN_P2P,
+                                   false );
         }
     }