tree eb28c19f225757e46382c2632ba30da6ff7f34c5
parent e03fb4459cd3ace301926bdfda75034becfc79bc
author Christopher Wiley <wiley@google.com> 1463684094 -0700
committer Christopher Wiley <wiley@google.com> 1465316505 -0700

Extract TetherInterfaceSM to its own class.

( cherry-pick of e3f93b02bdfde6fffd2bcbb2e1dc0785ce9f8d5a )

Attempt to keep all existing logic in place, except:

 + Marked a constructor as public, rather than default visible.
 + Added TAG, DBG, VDBG, and decoder ringer statics.
 + Moved static constants related to USB IPs into TetherInterfaceSM.

Bug: 28833951
Test: WiFi Tethering works on angler.

Change-Id: Id961220a9045832354cfe7381e5e9c0d8f54bf90