Packages 
Package Description
com.azure.android.core.http
Package containing HTTP abstractions, dispatcher for HTTP calls and HTTP client.
com.azure.android.core.http.exception
Package containing http exception classes.
com.azure.android.core.http.implementation  
com.azure.android.core.http.policy
Package containing HttpPipelinePolicy implementations.
com.azure.android.core.http.util
Package containing utils used by HttpClients.