Adjust network provider

[breedx-splk]

This needs to:

1. Rebase after Leverage upstream improvements #710 is merged (this builds on that)
2. Wait until Add network change monitoring open-telemetry/opentelemetry-android#176 in upstream is merged.

Moves the creation of the network provider closer to its usage and then calls the setter to allow sharing of the instance with the underlying implementation. It then removes the explicit setup/installation of the network component.

Note that the network provider is still used by the bespoke disk buffering exporter to ensure that the network is available for sending.