Implement Relay bundle upsell message

[data-sync-user]

trafficstars

Story:

As a VPN user I would like to know that there is a VPN/Relay bundle so I can get more privacy and security tools at a discount.

Acceptance criteria:

• CTA takes user into upgrade flow
• Shows localized cost of bundle
• App icon should not be badged if this is the only new message.
• In-app mail icon should be badged
• Only show to users in the US. (the user has completed the first subscription from an US IP address (geo-ip))
• Only show to users who did not purchase their subscription through an app store
• Telemetry:
  • Did the users who saw the message upgrade to the bundle? in the moment or later? How much later?
  • Are users annoyed with this message? Annoyed enough to churn?

┆Issue is synchronized with this Jira Task ┆author: Lesley Norton