83924 Remove TextTheme deprecations (team, framework, f: material design, severe: API break, cla: yes, waiting for tree to go green, tech-debt)

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

83944 Run dart fix on customer tests as promised (team, cla: yes, waiting for tree to go green)

83956 Migrate application_package to null safety (team, tool, cla: yes, waiting for tree to go green, a: null-safety)

83959 Remove “unnecessary” imports. (a: tests, team, framework, f: material design, cla: yes, f: cupertino, waiting for tree to go green)

83964 Pin the customer_tests (team, cla: yes, waiting for tree to go green)