68207 Revert “Improve performance of collectAllElements” (a: tests, cla: yes, framework, team)

68214 reland List queue search optimization (a: tests, cla: yes, framework, team)

68218 [devicelab] track any leaked processes (cla: yes, team)

68230 Use –device-timeout instead of deprecated –timeout in devicelab (cla: yes, team)

68239 [devicelab] mark catalina not flaky and list iproxy processes before test (cla: yes, team)

68260 [flutter_tools] configure screenshot on failure for all tasks (cla: yes, team)

68261 Fix screenshotting code (cla: yes, team)