Merge "Add tethering privileged test" am: c6cab2d5e8 am: 54c4148f8f am: 7b26300c42 am: 0f58ad8352

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1345361

Change-Id: Ie48b6709a5a962eac8c967912596d517040b80de