refactor(ads-client): housekeeping - sort fields/methods, add UniFFI defaults, split docs, add Client in HttpCache#7316

Almaju merged 1 commit intomozilla:mainmozilla/application-services:mainfrom

Almaju:ac-94-ads-client-refactoringAlmaju/application-services:ac-94-ads-client-refactoringCopy head branch name to clipboard