76339 Add fix for BottomNavigationBarItem.title -> label (cla: yes, f: cupertino, f: material design, framework, team, waiting for tree to go green)

76343 Added the ability to bring up the date picker dialogs in calendar or text input only mode. (cla: yes, f: material design, framework)

76387 Refactor tabbar code sample (cla: yes, d: api docs, documentation, f: material design, framework, waiting for tree to go green)

76493 Add menuMaxHeight for DropdownButton (cla: yes, f: material design, framework, waiting for tree to go green)

76532 [Fonts] Improve update_icons script (cla: yes, f: material design, framework, team)

76607 [Fonts] Update material icons (cla: yes, f: material design, framework)