Sync with libnativehelper refactoring am: 0cdccd707f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1348763

Change-Id: I7511170930440ec5a1a8067b57a76a6c19484d71
tree: 7ea4e7b20a6fa45676b574fcf4df3795619de5d6
  1. Tethering/