63703 migrate painting to nullsafety (cla: yes, framework, waiting for tree to go green)

63705 Revert “Add native stacktrace field for PlatformException” (cla: yes, framework)

63707 Surface Windows build errors in non-verbose mode (a: build, a: desktop, cla: yes, platform-windows, tool, waiting for tree to go green)

63726 Add windows builders to presubmit. (cla: yes, team)

63728 Provide the argument for a required parameter ‘data’. (a: tests, cla: yes, framework, waiting for tree to go green)

63730 Add an infra issue template (cla: yes, waiting for tree to go green)

63736 Update task_names to add the platform. (cla: yes, team, waiting for tree to go green)