80549 Migrate xcodeproj to null safety (team, tool, cla: yes, waiting for tree to go green, a: null-safety)

80554 Convert AnimatedSize to a StatefulWidget (team, framework, cla: yes, waiting for tree to go green)

80555 Migrate abstract_method_smoke_test to null safety (team, cla: yes)

80556 Migrate android_embedding_v2_smoke_test to null safety (team, cla: yes, waiting for tree to go green)

80557 Migrate android_views to null safety (team, cla: yes, waiting for tree to go green)

80558 Migrate flavors to null safety (team, cla: yes, waiting for tree to go green)