62825 Enable a scrolling fling test. (framework, waiting for tree to go green)

62828 Add native stacktrace field for PlatformException (framework)

62840 [ExpansionPanelList] adds elevation property (f: material design, framework, waiting for tree to go green, will affect goldens)

62859 Add gaplessPlayback docs default discussion (d: api docs, documentation, framework, waiting for tree to go green)

62866 [null-safety] remove quiver from flutter tests (framework, team, waiting for tree to go green)

62868 Revert “migrate part of painting to nullsafety” (framework)

62869 [null-safety] remove mockito from text control a11y test (framework, waiting for tree to go green)