Copy XmlUtils to wifi-service

XmlUtils transitively depends on
libcore.util.HexEncoding, which is @hide. Instead
copy XmlUtils into wifi-service and replace the
import with android.net.wifi.util.HexEncoding.

Bug: 147559755
Test: boots up and connects to Wifi
Change-Id: I09534a58992b593ab154c08f2ae7edfc54971901
5 files changed
tree: 776ec52459bba6bcc4d60ae1918491ab46466695
  1. apex/
  2. service/
  3. PREUPLOAD.cfg