Add visibility rules for packages/modules/Connectivity/Tethering am: 57a6738824 am: 26d118adc8 am: 8801009d8f

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

Change-Id: Idb03910a9542396d47baa1a9d98f8da2e69a786f
tree: a5ed007a7dafcc7996c8d492c27502b713d3aa3a
  1. staticlibs/