Sync the proto stats.proto from dns_resolver.proto
(Need to match as aosp/968223)

Bug: 119862317
Test: ./out/host/linux-x86/bin/statsd_testdrive 116

Merged-In: I13a40327754600aa57aba41cc9d487f7c9bb036e
Merged-In: I7fb3011c206016c3e7b7aab50b03903c0ae894db
(cherry picked from commit dc20156cb022e4c821d5ec7cf43fe17e9378f557)

Change-Id: Iedae482dafa61d6c3401b12f5414855b0633e439
1 file changed