Add Ethernet, TestNetworkSpecifier API am: ea33ac97f6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1574300

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I1a1b38fb6b8b6831bac016a8352ae9073758f9af
tree: d06d0905c62902924d403513af07a0c8ae0b3273
  1. framework/
  2. service/
  3. OWNERS