Imports of package policy

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
github.com/Azure/azure-sdk-for-go/sdk/azcore/internal/pipeline
github.com/Azure/azure-sdk-for-go/sdk/azcore/internal/shared
net/httpPackage http provides HTTP client and server implementations.
timePackage time provides functionality for measuring and displaying time.