Move Inet[4]AddressUtils to libs/net

The classes should not be picked up from frameworks/base, as they are
part of several mainline modules.

Bug: 151052811
Test: m; manual: flashed, wifi and telephony working
Test: atest CtsNetTestCasesLatestSdk:CaptivePortalApiTest
(clean cherry-pick from internal branch)
Merged-In: Ic7534afe3a437f2089ed33cebdad391dc498d187

Change-Id: Ic7534afe3a437f2089ed33cebdad391dc498d187
1 file changed
tree: 8b6b235927bcc1ee40eacec29fae430b3e9995bc
  1. tests/