Revert "Move Inet[4]AddressUtils to libs/net"

This reverts commit c98e38195d0e93b3924be2d4e63c47bb7bf57eec.

Reason for revert: Breaks the build b/160390899

Merged-In: Icd141a992c46290c74929785e261a1cd57bc001b
Change-Id: Ie10e66f61393602f17fbb61bf17230b176bf1f44
diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
index 97a7ecc..0b92b95 100644
--- a/core/java/android/net/NetworkUtils.java
+++ b/core/java/android/net/NetworkUtils.java
@@ -21,14 +21,13 @@
 
 import android.annotation.NonNull;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.net.shared.Inet4AddressUtils;
 import android.os.Build;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.util.Log;
 import android.util.Pair;
 
-import com.android.net.module.util.Inet4AddressUtils;
-
 import java.io.FileDescriptor;
 import java.math.BigInteger;
 import java.net.Inet4Address;
diff --git a/core/java/android/net/StaticIpConfiguration.java b/core/java/android/net/StaticIpConfiguration.java
index a973455..f24a9bd 100644
--- a/core/java/android/net/StaticIpConfiguration.java
+++ b/core/java/android/net/StaticIpConfiguration.java
@@ -21,11 +21,11 @@
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.net.shared.InetAddressUtils;
 import android.os.Parcel;
 import android.os.Parcelable;
 
 import com.android.internal.util.Preconditions;
-import com.android.net.module.util.InetAddressUtils;
 
 import java.net.InetAddress;
 import java.util.ArrayList;
diff --git a/tests/net/common/java/android/net/DhcpInfoTest.java b/tests/net/common/java/android/net/DhcpInfoTest.java
index 4d45ad7..bd5533f 100644
--- a/tests/net/common/java/android/net/DhcpInfoTest.java
+++ b/tests/net/common/java/android/net/DhcpInfoTest.java
@@ -16,7 +16,8 @@
 
 package android.net;
 
-import static com.android.net.module.util.Inet4AddressUtils.inet4AddressToIntHTL;
+import static android.net.shared.Inet4AddressUtils.inet4AddressToIntHTL;
+
 import static com.android.testutils.MiscAssertsKt.assertFieldCountEquals;
 import static com.android.testutils.ParcelUtilsKt.parcelingRoundTrip;