64175 feat: Text constructor, overflow, and softWrap docs (cla: yes, d: api docs, documentation, framework, waiting for tree to go green)

64189 (insert

move

remove)ChildRenderObject Deprecation: Step 1 (cla: yes, f: cupertino, f: material design, framework)

64199 Add native stacktrace field for PlatformException. (cla: yes, framework, waiting for tree to go green)

64200 Ignore unnecessary casts that can go away soon. (cla: yes, framework, waiting for tree to go green)

64217 (insert

move

remove)ChildRenderObject Deprecation: Step 2 (cla: yes, f: cupertino, f: material design, framework)