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
(clean cherry-pick from internal branch)
Merged-In: I2b3dcf2e238be047147232769602df56894dc6b1

Change-Id: I2b3dcf2e238be047147232769602df56894dc6b1
diff --git a/staticlibs/tests/unit/Android.bp b/staticlibs/tests/unit/Android.bp
index 52c5f82..cb15277 100644
--- a/staticlibs/tests/unit/Android.bp
+++ b/staticlibs/tests/unit/Android.bp
@@ -5,6 +5,7 @@
 android_library {
     name: "NetworkStaticLibTestsLib",
     srcs: ["src/**/*.java","src/**/*.kt"],
+    min_sdk_version: "29",
     jarjar_rules: "jarjar-rules.txt",
     static_libs: [
         "net-utils-framework-common",
@@ -16,6 +17,7 @@
     ],
     visibility: [
         "//frameworks/base/packages/Tethering/tests/integration",
+        "//packages/modules/NetworkStack/tests/integration",
     ]
 }