feat(stovepipe): add BuildRequest/BuildSignal queue contract#376

roychying wants to merge 2 commits into

uber:mainuber/submitqueue:mainfrom

roychying:chenghan.ying/stovepipe-build/buildsignal-queue-contractroychying/submitqueue:chenghan.ying/stovepipe-build/buildsignal-queue-contractCopy head branch name to clipboard