72553 Autocomplete Split UI (cla: yes, framework)

72558 Migrate some sample code to NNBD [1] (a: null-safety, cla: yes, d: api docs, d: examples, documentation, framework, team, waiting for tree to go green)

72560 Add PrioritizedIntents to support multiple shortcut configurations (a: desktop, cla: yes, f: focus, f: scrolling, framework, platform-web, severe: new feature, waiting for tree to go green)

72708 [State Restoration] Adds remaining Restorable{Property}N (a: state restoration, cla: yes, framework, waiting for tree to go green)

72741 Apply physics boundary to scrollbar dragging (a: quality, cla: yes, f: scrolling, framework, waiting for tree to go green)