Merge "Enable tethering namespace accessible in Android native level." am: 1f1155ea78 am: 21b092ae14 am: b7a0bd4430 am: 48093d551c

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

Change-Id: Idac2006e2c7082f96d0288e7d6dcef42c37eeeca