Add more external resources to Browser Security module

I have found that detection capabilities of AdGuard’s Browsing Security are insufficient. I think that they could be dramatically improved by adding more external resources like the web filters of Avira, BitDefender, Fortinet, Kaspersky, Sophos, and/or urlscan.io.

### Steps to reproduce

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### Expected behavior

### Actual behavior

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### Customer ID

### Your environment

* Environment name and version: (e.g. Chrome 59)
* Operating system and version: (e.g. Windows 10, v.1703, build 15063.413)