58686 [PageTransitionsBuilder] Fix ‘ZoomPageTransition’ built more than once (cla: yes, f: material design, framework, waiting for tree to go green)

58708 Add shadowColor to AppBar and AppBarTheme (cla: yes, f: material design, framework, waiting for tree to go green)

58715 Fix custom physics application in TabBarView (a: quality, cla: yes, f: material design, f: scrolling, framework, waiting for tree to go green)

58780 fix typo in bottom navigation bar docs (cla: yes, f: material design, framework, waiting for tree to go green)

58808 Introduce inherited navigator observer and refactor hero controller (cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)