Sync devices attributed metric

[cmonfortep]

Task/Issue URL: https://app.asana.com/1/137249556945/project/72649045549333/task/1211382557175163?focus=true

Description

Adds sync devices attributed metric

Steps to test this PR

Use logcat filter tag~:"AttributedMetrics"

Feature 1

• Fresh install (including removing ddg folder)
• Ensure Client status running: true -> isActive: true, isEnabled: true
• skip onboarding
• Create a sync account
• After creating the account you should see Fired pixel user_synced_device with params {device_count=1}
• Now you need another device
• Go to Sync settings
• Sync with Another device
• Read the QR code from your device account (accessing via Sync with another device inside Sync)
• After both devices connect
• Ensure you see Fired pixel user_synced_device with params {device_count=2}

Feature 2

• Fresh install (including removing ddg folder)
• Ensure Client status running: true -> isActive: true, isEnabled: true
• skip onboarding
• Inside FF inventory with syncDevices FF disabled
• Repeat the above steps for sync, no pixels emitted, metric is disabled

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 👈 (View in Graphite)
• 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
• 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

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