Restructure Module code [ com.android.tethering ]

Code Migration from frameworks/base/packages/Tethering ->
packages/modules/Connectivity/Tethering

BUG: 167962976
Test: TH
Merged-In: I2accb96abbdfa665ef34aa79e87af040226bcf32
Change-Id: Id7656fe7f6a6fae044dc8defd05e83d81c6b8c11
1 file changed
tree: 6139091396f19c939b0bcda4dd3a63db437ea18d
  1. core/
  2. services/
  3. wifi/