To add this component to your build, append --with-base src/power/system-activity-governor to your fx set invocation.
To add tests to your build, append --with //src/power/system-activity-governor:tests to your fx set invocation.
Run tests with:
$ fx test system-activity-governor
To see output, use the -o flag. First adjust the MACRO_LOOP_EXIT constant so that the assertion actually fires for non-matching Inspect.