78361 Reland [devicelab] Migrate Gallery to BuildTestTask (a: accessibility, cla: yes, team, waiting for tree to go green)

78371 Removed accentTextTheme references from Typography API doc (cla: yes, f: material design, framework)

78375 Removed accentColor refs from API docs (cla: yes, f: material design, framework)

78378 Removed accentColor and accentTextTheme dependencies from flutter_gallery (cla: yes, f: material design, team, waiting for tree to go green)

78380 [flutter_tools] handle OSError 2 from current working directory (cla: yes, tool)

78381 Add test for dart compilation error build output (cla: yes, team, tool, waiting for tree to go green)

78386 Try fixing web tool tests on windows (cla: yes, tool)