Exclude generated AutoValue source from code coverage tooling
Exclude generated AutoValue source from code coverage tooling

(cherry picked from commit a69dd0ad2aeda40e6b2486a276e9bdca95b0b29f)

elibixby/DataflowJavaSDK,sammcveety/DataflowJavaSDK,joshualitt/DataflowJavaSDK,elibixby/DataflowJavaSDK,sammcveety/DataflowJavaSDK,nevillelyh/DataflowJavaSDK,joshualitt/DataflowJavaSDK