Merge changes from topic "tether_migrate"

* changes:
  [Tether10]Remove UserManagerInternal usage in Tethering
  [Tether07] Migrate Tethering into module
  [Tether07] Clean up build rule for libtetheroffloadjni
tree: fc21f3417c9ad8621bd1f17710240bc7d26a0104
  1. core/
  2. services/
  3. wifi/