52570 Fall back to environment SDKROOT passed from Xcode (cla: yes, t: xcode, tool)

52574 Do not check the executable status of gen_snapshot if it has not yet been downloaded (cla: yes, tool, waiting for tree to go green)

52579 Revert “[flutter_tools]: reland android device cleanup” (cla: yes, tool)

52580 Fix typo its to it’s (a: tests, cla: yes, d: api docs, framework, waiting for tree to go green)

52583 Revert “Fall back to environment SDKROOT passed from Xcode” (cla: yes, tool)

52585 Roll engine cf2424bbd289..e48761e5bb05 (4 commits) (cla: yes, waiting for tree to go green)