This is an extension the main CTS test suite, for general compatibility tests that require root privileges or a debuggable device.
Note that the name of this suite in the build system is CTS_ROOT (with an underscore), so this is built with m cts_root and tests must be tagged with cts_root in their test_suites to be included.
However in tradefed the name is cts-root (with a hyphen), so use cts-root-tradefed to run it, and run cts-root to run the default cts-root plan.