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 NetworkStackCoverageTests
Change-Id: I62da3419408b7eb71ea5319e8717fbb22c76a94e
diff --git a/Android.bp b/Android.bp
index a671567..6ccbd18 100644
--- a/Android.bp
+++ b/Android.bp
@@ -90,6 +90,7 @@
         "netd_aidl_interface-java",
         "netlink-client",
         "networkstack-client",
+        "net-utils-framework-common",
         "datastallprotosnano",
         "statsprotos",
         "captiveportal-lib",