Make Tethering#dump asynchronous. am: 5f729e14a3 am: c7a163bae8 am: 778d795271

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1678386

Change-Id: Ideb8059f0a47da50be761c9484e18622a02f01c9
tree: a351abba314de2d49514e8a289c55722aca02526
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING