status: Add status end time functionality (#1944)#2080

AshutoshKhadse23 wants to merge 4 commits intozulip:mainzulip/zulip-flutter:mainfrom

AshutoshKhadse23:feature/add-status-expiration-timeAshutoshKhadse23/zulip-flutter:feature/add-status-expiration-timeCopy head branch name to clipboard