Modularize the code for DNS count reporting to allow it to be customized for
more flexible systems.
Tested:
Uploaded to alpha with hacks to allow admin initiating and logging from the
DnsCountQueryCoordinatorModule, verified that the provider function is invoked and
that the action runs successfully.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=225225587
