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

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

Change-Id: I3ad17fcd7cb2218792651061e0d2b28656094cac