Instrumentation for the android volley http client library

[jkwatson]

Library source: https://github.com/google/volley
Library docs: https://developer.android.com/training/volley/index.html

It looks like we could provide wrapper instrumentation for the com.android.volley.toolbox.HurlStack. We might also want to provide an extension to the com.android.volly.RequestQueue to capture the Context at the call site as well.

[laurit]

Implemented in https://github.com/open-telemetry/opentelemetry-android/tree/main/instrumentation/volley