Change tethering file structure to respect its package name

Bug: 145099347
Test: atest TetheringTests
      atest CtsTetheringTest
Change-Id: I7401c550fbafd17a5ed2d925b5d0e17e358af467
28 files changed
tree: 8faff7517a3e25aab81c869f09cb2fe9aba8baeb
  1. Tethering/