35225 add sample code for AnimatedContainer (a: animation, cla: yes, d: api docs, d: examples, framework)

35231 Fix coverage collection (cla: yes, tool)

35232 New benchmark: Gesture semantics (cla: yes, waiting for tree to go green)

35233 Attempt skipping coverage shard if tools did not change (cla: yes)

35237 Revert “Manual engine roll, Update goldens, improved wavy text decoration 0f9e297ad..185087a65f” (cla: yes)

35242 Reland “Manual engine roll, Update goldens, improved wavy text decoration 0f9e297ad..185087a65f”” (cla: yes)