esp-idf: Corrected check of Class of Device for discovered devices

Current code stopped inquiry if major class is not Phone. Modified the
condition to consider for both Phone and Audio to cover majority of real
world devices.

Closes https://github.com/espressif/esp-idf/issues/6548

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

@@ -149,7 +149,8 @@ static void update_device_info(esp_bt_gap_cb_param_t *param)
     }
 
     if (!esp_bt_gap_is_valid_cod(cod) ||
-            !(esp_bt_gap_get_cod_major_dev(cod) == ESP_BT_COD_MAJOR_DEV_PHONE)) {
+	    (!(esp_bt_gap_get_cod_major_dev(cod) == ESP_BT_COD_MAJOR_DEV_PHONE) &&
+             !(esp_bt_gap_get_cod_major_dev(cod) == ESP_BT_COD_MAJOR_DEV_AV))) {
         return;
     }