Add a new method in LinkProperties, isWakeOnLanEnabled() which returns true if network interface is defined in config_wakeonlan_enabled_interfaces string-array (config.xml) Bug: 132705025 Test: atest LinkPropertiesTest & atest ConnectivityServiceTest Change-Id: I3f7803aafd2f8eaf8aa18419b21339e15d4b7a0b