Refresh AP pool before reconnecting

See spocon/spocon#37

Author: devgianlu

lib/src/main/java/xyz/gianlu/librespot/core/ApResolver.java

@@ -48,6 +48,12 @@ public static void fillPool() throws IOException {
         if (!poolReady) request("accesspoint", "dealer", "spclient");
     }
 
+    public static void refreshPool() throws IOException {
+        poolReady = false;
+        pool.clear();
+        request("accesspoint", "dealer", "spclient");
+    }
+
     @NotNull
     private static List<String> getUrls(@NotNull JsonObject body, @NotNull String type) {
         JsonArray aps = body.getAsJsonArray(type);

lib/src/main/java/xyz/gianlu/librespot/core/Session.java

@@ -704,6 +704,8 @@ private void reconnect() {
         }
 
         try {
+            ApResolver.refreshPool();
+
             if (conn != null) {
                 conn.socket.close();
                 receiver.stop();