72541 Proposal : #72346 - expose property to pass AnimationController to showBottomSheet/showModalBottomSheet (a: animation, cla: yes, f: material design, framework)

72544 Fix bug in docs.dart (cla: yes, team)

72548 Update various API docs (cla: yes, framework)

72553 Autocomplete Split UI (cla: yes, framework)

72554 groovy escaping was wrong for aar (cla: yes, tool)

72557 Create SECURITY.md (cla: yes, team)

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)