79421 Add missing io import to complex_layout_semantics_perf (a: accessibility, cla: yes, team)

79422 Remove some globals from the tool (cla: yes, tool)

79434 add missing trailing commas (a: accessibility, cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

79454 [flutter_tools] remove globals from Device and separate FlutterDeviceManager (cla: yes, tool)

79455 [flutter_tools] Move sksl writing out of vm_service (cla: yes, tool)

79456 roll gallery version to fix build (team)

79459 [flutter_tools] remove unused testbed method (cla: yes, tool)