dataconnect: use firebase-tools to launch fdc emulator instead of launching it directly#6896

dconeybe merged 6 commits intomainfirebase/firebase-android-sdk:mainfrom

dconeybe/dataconnect/FirebaseToolsForDataConnectEmulatorfirebase/firebase-android-sdk:dconeybe/dataconnect/FirebaseToolsForDataConnectEmulatorCopy head branch name to clipboard