Feat: query the SW version and display alongside the other versions in the User Settings

[taoeffect]

Problem

To help debug potential problems on mobile devices, it would help make sure that they're running the latest SW version. It's hard to know if they are though.

Solution

This involves three parts:

1. Implement an API on the SW to return the GI_VERSION version it's running
2. When the User Settings are mounted, query this value and display it alongside the other version values in the User Settings
3. When the gi_logs are exported, add this and all other versions to the JSON headers. There should be 3 values: GI_VERSION of browser, GI_VERSION of SW, and GI_CONTRACTS_VERSION