Add visibility rules for packages/modules/Connectivity/Tethering am: 57a6738824 am: 26d118adc8

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1478979

Change-Id: Ic63c679b38a9931352e5d1f8e477ca1271d17fa4
tree: a5ed007a7dafcc7996c8d492c27502b713d3aa3a
  1. staticlibs/