83926 Remove deprecated typography constructor (team, framework, f: material design, severe: API break, cla: yes, waiting for tree to go green, tech-debt)

84011 Migrate vitool to null safety (team, cla: yes, a: null-safety, tech-debt)

84013 “Migrate” dummy packages to null safety (team, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)

84061 migrate mega_gallery to null safety (team, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)

84063 migrate update_icons to null safety (team, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)