Remove the obsolete code for logd and add statsd socket log loss detection.

+ Remove dead code
+ Add a simple log loss detection as a starter to see if there is any log loss
  detected at all.

TODO: If we do see log loss, we can add more sophisticated logging and reset mechanism.

Bug: 80538532
Test: statsd_test
Change-Id: Iff150c9d8f9f936dbd4586161a3484bef7035c28