Add global change ethernet state API

Provide a new API to enable or disable ethernet. Also have a listener
for call to check whether enable state is sucessful.

Bug: 171872016
Test: atest EthernetServiceTests

Change-Id: Iee4b48511ff668a2a7df90fd9bfe563d7ff23940
Merged-In: Iee4b48511ff668a2a7df90fd9bfe563d7ff23940
5 files changed
tree: 0d278ab1fdabf55ef5b6d55b9a19334d07f9bb6d
  1. service-t/
  2. tests/