[NETD-TC#14] Add traffic controller JNI to tethering module am: 790c83e387 am: 404cd863ee am: 6adbaae9c2

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1948169

Change-Id: I45305957622d154bb46f52a96ddc21aabc2b0fdc