Add infrastructure for logging in TP

This CL only adds the logger, it's not being called
from anywhere yet. That will come in a follow-up CL.

StatsLogEventLogger for now only logs to logcat,
StatsLogCompat calls are currently commented out as
it's not fully working.

Bug: 129365634
Change-Id: I81eba2956c07c5a59831a2805171200d6b1174cd