37479 Remove bogus code in ContainerParentDataMixin.detach (cla: yes, framework, waiting for tree to go green)

37489 Moved the default BinaryMessenger instance to ServicesBinding (a: tests, cla: yes, customer: espresso, d: examples, framework, severe: API break, t: flutter driver, team)

37492 Drawer edge drag width improvements (cla: yes, f: material design, framework, severe: new feature)

37497 Extract common PlatformView functionality: Gesture and PointerEvent (cla: yes, framework)

37500 Avoid killing Flutter tool process (#37471) (cla: yes, tool)

37503 Quickly fix start up tests (cla: yes, framework)

37509 Use macOS ephemeral directory for Pod env script (cla: yes, tool)