am f4740f2d: Add an API to check availability of Ethernet interface.

* commit 'f4740f2d370b6458126942156245b2d39ec223f9':
  Add an API to check availability of Ethernet interface.
tree: 7e763537b2e37857fd879d1c48dd055c0c90c968
  1. service-t/
  2. Android.mk