- 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
(cherry picked from commit f1315c3cd6d77e812ae32fe038b4e8bf2e70d5bf)
cd0cfbbc61