http-client-java, use polling metadata in emitter for mgmt#9109

weidongxu-microsoft wants to merge 5 commits intomicrosoft:mainmicrosoft/typespec:mainfrom

weidongxu-microsoft:http-client-java_use-PollingMetadataweidongxu-microsoft/typespec:http-client-java_use-PollingMetadataCopy head branch name to clipboard