33/n: Do not upload logs if any fields are unknown

Currently all ClientMonitors extend from LoggableMonitor. In the
interest of time, let's leave the structure the way it is. Since
logging does not apply to all monitors, check if fields are unknown
before logging.

Bug: 157790417
Test: Builds
Change-Id: Iac0daffdec26a07b8debdf506caaf70718c71ee8