Add statsd-service to system server jars

Add statsd-service to system server jars so that StatsCompanionService
continues to exist in system server.

Bug: 141697533
Test: builds and boots: 1. make clean 2. m -j droid 3.
vendor/google/tools/flashall
Change-Id: Ie26e3ac23c407364f5ab6796ee2c65023c87360e