tree ecdda333a553d99ad7a055aebcd5e4df7b06f38b
parent e949039081b08626590be9783c85f358955e1b82
author Christopher Wiley <wiley@google.com> 1464730988 -0700
committer Christopher Wiley <wiley@google.com> 1465317192 -0700

Tethering: Own WiFi tethering state and lifetime

( cherry-pick of f1315c3cd6d77e812ae32fe038b4e8bf2e70d5bf )

- Add logic to Tethering to track whether the user has requested
  tethering via WiFi.
- Subscribe to intents regarding soft AP state to enable and
  disable tethering when the AP comes up or goes down.
- Refactor IP configuration logic to do configuration for WiFi
  as well as USB.

Bug: 29054780
Test: WiFi tethering continues to work on angler
      Tethering related unittests continue to pass.

Change-Id: I6eff2573ca3fd11fabcf138c468ba517ff2daf65