Add blocking algorithm (isMalicious)

[CrisBarreiro]

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

Description

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

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
  • 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]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Add blocking algorithm (isMalicious) #5376 : 2 dependent PRs (#5406 , #5416 ) 👈 (View in Graphite)
• Load and store embedded dataset #5370
• Intercept requests and add skeleton for malicious site detection #5369
• develop

This stack of pull requests is managed by Graphite. Learn more about stacking.

[graphite-app]

The test assertion needs to wait for the coroutine to complete. Add advanceUntilIdle() after calling isMalicious() to ensure the async callback has a chance to execute before checking onSiteBlockedAsyncCalled. Without this, the test may fail intermittently since it's racing against the coroutine.

Spotted by Graphite Reviewer

Is this helpful? React 👍 or 👎 to let us know.