Synced Tab Pickup Onboarding Message

[sarah541]

Description

When I open the homepage after leaving a tab open on another device, I see a message pointing out that tab, so that I understand where the tab is coming from and that I’m able to easily move between devices using this feature

Dependencies

• List dependencies on other issues/teams etc.

Acceptance Criteria

• A Synced Tab Pickup pop up message will be displayed on the homepage under the following the conditions:

    The user has an open tab from a synced device in Jump Back In
  
    They have not seen the Synced Tab Pickup message before (unless they reinstall the app)
  

• If the user clicks on the X to close the message or clicks elsewhere on the homepage, then the message will close
  

• The pop up message matches the [attached designs](https://www.figma.com/file/7J6gh5D8DbGTExxskKdn3T/Mobile-Onboarding?node-id=1950%3A64966)
  

• The message is behind the MR Onboarding Nimbus feature flag
  

• The following telemetry is captured:
  
    Impression counts 
  
    Click counts on the X
  
    Clicks elsewhere on the screen that close the message are counted
  

┆Issue is synchronized with this Jira Task

[delia-pop]

Verified as fixed with latest Debug build updated from main locally with Google Pixel 6 (Android 13). We will re-test this on Nightly when available.