59695 Change iOS device discovery from polling to long-running observation (cla: yes, tool)

59705 skip fuchsia_precache-linux on release branches (cla: yes, waiting for tree to go green)

59706 [flutter_tools] maintain file manifest for create (cla: yes, tool)

59709 Clean up PollingDeviceDiscovery dispose (cla: yes, tool, waiting for tree to go green)

59711 fix the widget span layout when text scale factor != 1 (cla: yes, framework, waiting for tree to go green)

59714 Use a HeaderBar for Linux applications. (cla: yes, tool)

59717 Manual engine roll to update format of compileExpression RPC response (cla: yes, engine, tool, waiting for tree to go green)