50520 Update TextStyle.hashCode to handle list fields (cla: yes, framework, waiting for tree to go green)

50523 Invalidate _SliverFractionalPadding cache on constraint change (cla: yes, f: scrolling, framework)

50535 Roll engine e4f46f32f1fd..0e8ed2715a35 (21 commits) (cla: yes, waiting for tree to go green)

50536 Use BUILD_LIBRARY_FOR_DISTRIBUTION build setting for generating add-to-app frameworks (a: existing-apps, cla: yes, team, tool, waiting for tree to go green)

50538 [flutter_tools] fix path escaping on in depfile generation (cla: yes, tool)

50546 Material Date Picker redesign (a: internationalization, cla: yes, f: material design, framework, team)