Add RouteProviders to the new Media APIs

Compiles and works with OneMedia. This currently is a rough test of
the system for finding, connecting to, and sending messages to routes.
This will just connect to the first route it finds when a request to
open the route picker is made (and disconnect when another request is
made).

Change-Id: I5de5521a079471b9e02664be4654c0591dfd9a6d