67470 Remove examples/catalog (a: accessibility, cla: yes, d: examples, team, waiting for tree to go green)

67542 Revert “Remove examples/catalog” (a: accessibility, cla: yes, d: examples, team)

67545 Reland removal of examples/catalog (a: accessibility, cla: yes, d: examples, f: material design, framework, team, waiting for tree to go green)

67550 Refactor devicelab logic to use TaskResult instead of JSON (a: accessibility, cla: yes, team, waiting for tree to go green)

67552 [flutter_releases] Flutter 1.22.1 Framework Cherrypicks (cla: yes, engine, f: material design, framework, team, tool)