Merge "Rename tethering util folder and its package name" am: ea0cfd1897 am: e4235b83be am: 1738c7fda3 am: 1329691f70

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1879620

Change-Id: I6ed87541297b86ab629a1adc5e9bc8eefdc7dcbd