Merge "Allow tethering pick prefix from all of private address range" am: 8c9a2645d8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1436852

Change-Id: Ief2520cd30059542ae3786a36b92198af6739a2a
tree: e0dc66515cbd6c3ccdcb84367ce8835fc8d67a64
  1. Tethering/