Add blocking algorithm

[CrisBarreiro]

Task/Issue URL: https://app.asana.com/0/72649045549333/1207151848931036/f
Also includes: https://app.asana.com/0/72649045549333/1208870183150418/f

Description

• Add logic to keep a malicious site dataset up-to-date
• Add blocking algorithm for malicious sites (temporarily show a snackbar whenever a site is identified as malicious)
  • Add algorithm to determine whether a URL is malicious or not. Details are described here (Approach A, "Implement MaliciousSiteDetection client library that" section). API was discussed here

Steps to test this PR

Pre-requisites

• Enable enableMaliciousSiteProtection under androidBrowserConfig

Note

Since this implementation only shows a toast, my recommendation is to do the testing along with #5416

Feature 1

• Open https://privacy-test-pages.site/security/badware/, check snackbar isn't shown
• Check a Snackbar informing of a malicious site is shown for the following tests
  • Standard Phishing Test
  • Standard Malware Test
  • Phishing iFrame Loader
  • Phishing JS Redirector (Direct)
  • Phishing JS Redirector (Indirect)
  • Phishing Legit iFrame Loader
  • Phishing Redirect via Meta Refresh (Not Flagged in Dataset)
  • Phishing Redirect via Meta Refresh (Flagged in Dataset)
  • Phishing Open via Popups
  • Phishing Opening with URL Tampering
  • Phishing Form Submission -> Submit form
  • Phishing Service Worker - Only navigate, not fetch
  • HTTP 301 Redirect to Main Phishing Test Page
  • HTTP 302 Redirect to Main Phishing Test Page
  • HTTP Redirect to Phishing JS Redirector (Indirect)
  • HTTP Redirect to Phishing JS Redirector (Direct)
  • HTTP Redirect to Phishing iFrame Loader
  • HTTP Redirect to Clean Meta Refresh Redirector
  • HTTP Redirect to Flagged Meta Refresh Redirector

UI changes

n/a, toast is temporary, an error page will be added in the next PR

[CrisBarreiro]

• Add blocking algorithm #5370 : 3 dependent PRs (#5376 , #5416 , #5510 ) 👈 (View in Graphite)
• Intercept requests and add skeleton for malicious site detection #5369
• develop

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[cmonfortep]

Left some questions about the insert, if that's the expected behavior I'm good here.