add IWorkflowServiceV4 interface#987

shijiesheng merged 1 commit intocadence-workflow:feature/issue-985/thrift-deprecationcadence-workflow/cadence-java-client:feature/issue-985/thrift-deprecationfrom

shijiesheng:v4interfaceshijiesheng/cadence-java-client:v4interfaceCopy head branch name to clipboard