[Tether07] Migrate Tethering into module
am: a2f6c26b7d

Change-Id: I1aaa034e91eae2d6e9abcbbd70741a54a18b3ddc
tree: fc21f3417c9ad8621bd1f17710240bc7d26a0104
  1. core/
  2. services/
  3. wifi/