77263 Re-land “Toggable Refactor (#76745)” (a: accessibility, cla: yes, f: material design, framework, team, waiting for tree to go green)

77294 Enable avoid_unnecessary_containers lint (a: accessibility, a: tests, cla: yes, f: cupertino, f: material design, framework, team, waiting for tree to go green)

77307 [devicelab] Create BuildTestTask (cla: yes, team, waiting for tree to go green)

77327 Fix typo (cla: yes, d: examples, team)

77329 Bitcode strip Flutter.framework in assemble build target (cla: yes, platform-ios, team, tool)