Merge "Enable tethering namespace accessible in Android native level." am: 1f1155ea78 am: 21b092ae14 am: b7a0bd4430

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1873955

Change-Id: Iba983ebbd4025b18115d6f6c46fa2276b5d306e4