LinkProperties function to compare provisioning and remove DNS servers

Adds:
    - enum ProvisioningChange
    - LinkProperties#compareProvisioning()
          return a ProvisioningChange value describing the delta in
          provisioning between two LinkProperties objects
    - LinkProperties#removeDnsServer()
    - make "@hide public" isIPv4Provisioned() and isIPv6Provisioned()

Bug: 18581716
Change-Id: I3df90b2b89617f693346f2dbe72e77c88ce91ffd
2 files changed
tree: 3bd60fec5ad79fab90ef69267e435cb0b46c2da4
  1. core/
  2. services/
  3. tests/