80763 Migrate gen_l10n to null safety (team, tool, cla: yes, waiting for tree to go green, a: null-safety)

80803 [flutter_tools] generate install manifest for UWP builds (tool, cla: yes, waiting for tree to go green)

80817 fix sort_directives violations (a: tests, team, tool, framework, f: material design, a: accessibility, cla: yes, f: cupertino, waiting for tree to go green)

80838 Log full app bundle location after “flutter build ios” (tool, cla: yes, waiting for tree to go green)

80876 [flutter_tools] split host artifacts out of Artifacts (tool, cla: yes, waiting for tree to go green)

80879 [flutter_tools] run UWP builds ahead of cmake (tool, cla: yes)