fix(bt/bluedroid): Fix the mistaken deletion of bluedriod enable in bt_spp_acceptor example

examples/bluetooth/bluedroid/classic_bt/bt_spp_acceptor/main/main.c

@@ -232,6 +232,11 @@ void app_main(void)
         return;
     }
 
+    if ((ret = esp_bluedroid_enable()) != ESP_OK) {
+        ESP_LOGE(SPP_TAG, "%s enable bluedroid failed: %s", __func__, esp_err_to_name(ret));
+        return;
+    }
+
     if ((ret = esp_bt_gap_register_callback(esp_bt_gap_cb)) != ESP_OK) {
         ESP_LOGE(SPP_TAG, "%s gap register failed: %s", __func__, esp_err_to_name(ret));
         return;