Add script for starting logging and fix race condition in 4230.

We can add the script back for starting logging due to the new design
for enabling it through cis-compliance. It is opted-out by default and
users have to go and delete it's opt out to have the script run. This
makes it a very deliberate user choice to use our logging and still
allows autoVM to track the logging is running benchmark.

BUG=b/327004469
TEST=None
RELEASE_NOTE=Add script to start logging for cis-level2 if the default
opt-out flag is removed by the user.

cos-patch: bug
Change-Id: Id5c6eb839ddc96f44d48bbc71834c1cc83985d40