63517 Move Android doctor SDK check to 29 and Cirrus images to 30 (a: accessibility, cla: yes, d: examples, team, tool)

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)

64020 [flutter_tool] Fix amberctl host address (cla: yes, d: examples, team, tool, waiting for tree to go green)