78329 Revert “Align more closely with package:test” (a: accessibility, a: tests, cla: yes, f: material design, framework, team, tool)

78343 Align more closely with package:test (#77118) (a: accessibility, a: tests, cla: yes, f: material design, framework, team, tool, waiting for tree to go green)

78355 Revert “[devicelab] Migrate Gallery to BuildTestTask” (a: accessibility, cla: yes, team)

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

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