Merge "Add LinkProperties methods to system APIs" am: b64d2c9501 am: 80bcbcdeec

Change-Id: Ie0a102ceb853c9f61d3e1deb369938a48edcdcac
tree: 38b1b8b07b5733374eded107ff0beca203e2d679
  1. core/
  2. services/
  3. tests/