Change tethering file structure to respect its package name

Bug: 145099347
Test: atest TetheringTests
      atest CtsTetheringTest
Change-Id: I544ab9480bbaa5e18e030d21a28ab4c4a7265795
28 files changed
tree: a11b20c1d90e3f42046582ab6936d446b9c0117c
  1. Tethering/