55998 Fixes the navigator pages update crashes when there is still route wa… (cla: yes, f: routes, framework, severe: API break, waiting for tree to go green)

56390 Roll engine 33d236795015..4b7380b55f6d (3 commits) (cla: yes, severe: API break, waiting for tree to go green, will affect goldens)

56582 Update Tab semantics in Cupertino to be the same as Material (a: accessibility, a: internationalization, cla: yes, f: cupertino, framework, severe: API break, waiting for tree to go green)

56740 Roll engine 9b905d3f03f2..9d8daf2383ea (19 commits) (cla: yes, severe: API break, waiting for tree to go green, will affect goldens)