61136 Re-land Expose height and width factor in AnimatedAlign (a: animation, cla: yes, framework, waiting for tree to go green)

63833 SizeTransition sample code (a: animation, cla: yes, d: api docs, d: examples, documentation, framework, waiting for tree to go green)

63886 Add sample code for ScaleTransition (a: animation, cla: yes, d: api docs, d: examples, documentation, framework, waiting for tree to go green)

63940 Add sample code to RelativePositionedTransition (a: animation, cla: yes, d: api docs, d: examples, documentation, framework, waiting for tree to go green)

64715 Clamp TabController animation value when calc _DragAnimation.value (a: animation, cla: yes, f: material design, framework, waiting for tree to go green)

will affect goldens - 6 pull request(s)