Merge "Add a separate namespace for Tethering module." am: 8f2ec1df33 am: 2300efc24c am: 421813d450

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1873993

Change-Id: Ibbcf28b3348a222ab9531bd7ebb5dec68a645340