[native] Add staffUserHasBeenLoggedInIndicator to LoggedInModal
Summary:
Context: https://linear.app/comm/issue/ENG-2134/have-a-flag-that-indicates-whether-the-build-is-a-staff-release
Consumes StaffContext and displays whether a staff user has logged in only if staffCanSee is true.
(Will restyle a bit after diff that adds staffUserHasBeenLoggedIn indicator to Build Info page of Profile tab.)
Test Plan:
Here's what it looks like after a staff user has logged in and subsequently logged out:
Reviewers: ashoat, tomek, varun, ginsu, rohan
Reviewed By: ashoat
Subscribers: abosh
Differential Revision: https://phab.comm.dev/D5514