Local Tethering with ncm interface

Bug: 130840842
Test: build, boot
      atest TetheringTest
      manual test (call startTethering(TETHERING_NCM))

Merged-In: Icc6c4d6be39e787503cecf3a5835b40d4be12a57
Change-Id: Icc6c4d6be39e787503cecf3a5835b40d4be12a57
(clean cherry-pick)
10 files changed