Move HTTP status handling out of handlers#2499

rfontanarosa wants to merge 8 commits intomastergoogle/ground-platform:masterfrom

rfontanarosa/1920/code-health-emit-ok-http-status-in-callbacks-instead-of-onhttpsrequestasync-1google/ground-platform:rfontanarosa/1920/code-health-emit-ok-http-status-in-callbacks-instead-of-onhttpsrequestasync-1Copy head branch name to clipboard