67147 5x startup test repitition to reduce noise (cla: yes, customer: money (g3), perf: speed, severe: performance, team, waiting for tree to go green)

67176 Add benchmark/test for drawing images across frames (cla: yes, severe: performance, team, waiting for tree to go green)

68065 Improve performance of collectAllElements (a: tests, cla: yes, framework, perf: speed, severe: performance, t: flutter driver, team, waiting for tree to go green)

69629 Initial migration of metrics_center (cla: yes, severe: performance, team, team: infra)

a: animation - 7 pull request(s)

48223 Add HeroMode widget (a: animation, cla: yes, f: cupertino, f: routes, framework, waiting for tree to go green)