Merge changes I969d6182,Ie73f7b4d

* changes:
  [NFCT.TETHER.4] Migrate tetherOffloadRuleRemove from netd to mainline
  [NFCT.TETHER.3] Migrate tetherOffloadGetStats from netd to mainline
tree: b48a2d6dbbff4613893fca6fad0c3e25fbfa1b80
  1. framework/
  2. tests/
  3. Tethering/
  4. .gitignore
  5. OWNERS
  6. PREUPLOAD.cfg
  7. TEST_MAPPING