49261 Add additional expects to check if flake is a race (cla: yes, framework, waiting for tree to go green)

49262 Disallow empty platforms and specific platforms when parsing manifest for plugins (cla: yes, tool, waiting for tree to go green)

49264 Roll engine f38f6a09be65..79f898e61d9c (5 commits) (autoroller: commit, cla: yes)

49265 Fix build aar instructions (cla: yes, tool, waiting for tree to go green)

49272 Roll engine 79f898e61d9c..83a64b7233d5 (4 commits) (autoroller: commit, cla: yes)

49276 Copy the local engine repo in the output directory (cla: yes, tool)