Merge "Separate tethering build target to Tethering and TetheringNext" am: 7509c7a67e am: ab61c4e42f am: 006c3f1e5e

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1870417

Change-Id: Ic4816c970cc5f50c162faf163c649af0a702ba7e