MalgoBlock

Issues with playing mp4 content on Tizen

16

**Have you read the [FAQ](https://bit.ly/ShakaFAQ) and checked for duplicate open issues?** There is a couple of open issues where video does not start at all on Tizen. (#4142 and #4143),...

Now that CookieManager.flush() is added could you also add flush to index.d.ts?