Merge "Expose EthernetManager state and control APIs." am: 212e17e6ac

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1968559

Change-Id: I4ee521da4bc1e71fd577092ef6313d048f253663
tree: 874fbf34e7ecaba8f5cba74dbd52ad20b65919b6
  1. framework/
  2. framework-t/
  3. service-t/
  4. services/
  5. tests/