Adds attributed metric for ad clicks

[cmonfortep]

Task/Issue URL: https://app.asana.com/1/137249556945/project/72649045549333/task/1211382557175160?focus=true

Description

Adds ad clicks attributed metric as per specs in https://app.asana.com/1/137249556945/project/1206716555947156/task/1211301604929610?focus=true

Steps to test this PR

While testing this PR you need to add the following in your logcat filter:
tag~:"AttributedMetrics"

Feature 1

• We need fresh install (including removing DDG folder in file system)
• Open the app
• wait until "skip onboarding" appears
• After downloading privacy config and atb init, you should see Client status running: true -> isActive: true, isEnabled: true
• Skip onboarding, and go to the browser
• Perform search like "hotels in vietnam"
• click the first ad
• Ensure in logs Collected event ad_click
• Go to settings -> Attributed Metrics Dev Settings
• Click on "Add Ad clicks Events" so we add some test data
• Update installation date with 2d ago (and click save)
• Close the app, open it again (or fire button)
• Perform search like "restaurants in vietnam"
• Click first ad
• Ensure Fired pixel user_average_ad_clicks_past_week

UI changes

Before	After
!(Upload before screenshot)	(Upload after screenshot)

[cmonfortep]

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

• Sync devices attributed metric #7030
• Subscription status attributed metric implementation #7029
• Implement Duck ai usage attributed metric #7028
• update metrics config from remote #6999
• Adds attributed metric for ad clicks #6956 👈 (View in Graphite)
• Adding retention attributed metric #6955
• Adding search related attributed metrics #6899
• Add attributed metrics internal dev settings #6901
• Attributed metrics module and skeleton #6887 : 1 other dependent PR (#6940 )
• develop

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

[marcosholgado]

LGTM