Feature: Use network request for gathering attribution reporting data

[amovar18]

Description

This PR aims to gather attribution reporting data from network requests.

Relevant Technical Choices

• Any source or trigger that has to be registered in the browser has to send it via network request with appropriate headers.
  • For source registration, the source is sent via Attribution-Reporting-Register-Source header.
  • For trigger registrations, the trigger data is sent via Attribution-Reporting-Register-Trigger header in the network request.
  • The type of event that the source is being registered for is decided by Attribution-Reporting-Eligible.
• We can parse the required headers in the network request from the header and add some of the data that is not yet available via CDP API of Storage.attributionReportingTriggerRegistered as this API doesn't give the “Destination” and the “Reporting Origin” of the trigger.
• To keep the data in sync with what chrome://attribution-internals/ page shows, we can do the following process:
  • For trigger data, once data is parsed from the network request and added to the store, we listen to the Storage.attributionReportingTriggerRegistered event. This method fires after a delay because the browser has to store the trigger in a private cache after validation.
  • Once Storage.attributionReportingTriggerRegistered event is fired we take this data and use eventTriggerData in registration and compare it with the data in trigger that was registered from the network request and merge both the data to get values like debugKey, eventLevel, aggregable etc.

Testing Instructions

• Pull this branch.
• In the terminal run npm i && npm run build:ext.
• Now in the terminal run chrome-pat.
• Load the built extension.
• Go to the DevTools, open PSAT and navigate to attribution reporting section.
• Now go to india.com and check that the data is being populated in the tables.

Additional Information:

Screenshot/Screencast

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Checklist

• I have thoroughly tested this code to the best of my abilities.
• I have reviewed the code myself before requesting a review.
  - [ ] This code is covered by unit tests to verify that it works as intended. N/A
• The QA of this PR is done by a member of the QA team (to be checked by QA).