call claimant info on value change and handle claimant id of 0

[s-caso]

:warning: TeamSites :warning:

Examples of a TeamSite: https://va.gov/health and https://benefits.va.gov/benefits/. This scenario is also referred to as the "injected" header and footer. You can reach out in the #sitewide-public-websites Slack channel for questions.

Did you change site-wide styles, platform utilities or other infrastructure?

• [x] No
• [ ] Yes, and I used the proxy-rewrite steps to test the injected header scenario

Summary

• Make claimant info call whenever value changes
• Handle claimant id being 0