67884 [flutter_tools] document flutter root initialization (cla: yes, tool)

67899 Avoid skipping variable initialization using case. (cla: yes, tool, waiting for tree to go green)

67931 [flutter_tools] do not crash validator if intellij JAR file is missing (cla: yes, tool)

67936 [flutter_tools] teach flutter drive to uninstall if install fails (cla: yes, tool)

67954 Revert “[flutter_tools] fold executable resolution into flutter” (cla: yes, tool)

67957 [flutter_tools] reland: fold process resolution logic into the flutter tool (cla: yes, tool)

67959 [flutter_tools] do not measure progress timeout (cla: yes, tool)