Move BaseNetdUnsolicitedEventListener to frameworks/libs/net

Move BaseNetdUnsolicitedEventListener to frameworks/libs/net and
create a new library - netd-client for using.
Also remove netd_aidl_interface-unstable-java since netd-client
links to the stable one.

Bug: 174837473
Test: Manual test and check the log.
Change-Id: Id65142b8c13a6cccbfe387d4ab757967497546e6

Tethering/Android.bp

@@ -26,7 +26,6 @@ java_defaults {
     ],
     static_libs: [
         "androidx.annotation_annotation",
-        "netd_aidl_interface-unstable-java",
         "netlink-client",
         // TODO: use networkstack-client instead of just including the AIDL interface
         "networkstack-aidl-interfaces-unstable-java",
@@ -34,6 +33,7 @@ java_defaults {
         "android.hardware.tetheroffload.control-V1.0-java",
         "net-utils-framework-common",
         "net-utils-device-common",
+        "netd-client",
     ],
     libs: [
         "framework-statsd.stubs.module_lib",

Tethering/src/android/net/util/BaseNetdUnsolicitedEventListener.java

@@ -1,75 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.net.util;
-
-import android.net.INetdUnsolicitedEventListener;
-
-import androidx.annotation.NonNull;
-
-/**
- * Base {@link INetdUnsolicitedEventListener} that provides no-op implementations which can be
- * overridden.
- */
-public class BaseNetdUnsolicitedEventListener extends INetdUnsolicitedEventListener.Stub {
-
-    @Override
-    public void onInterfaceClassActivityChanged(boolean isActive, int timerLabel, long timestampNs,
-            int uid) { }
-
-    @Override
-    public void onQuotaLimitReached(@NonNull String alertName, @NonNull String ifName) { }
-
-    @Override
-    public void onInterfaceDnsServerInfo(@NonNull String ifName, long lifetimeS,
-            @NonNull String[] servers) { }
-
-    @Override
-    public void onInterfaceAddressUpdated(@NonNull String addr, String ifName, int flags,
-            int scope) { }
-
-    @Override
-    public void onInterfaceAddressRemoved(@NonNull String addr, @NonNull String ifName, int flags,
-            int scope) { }
-
-    @Override
-    public void onInterfaceAdded(@NonNull String ifName) { }
-
-    @Override
-    public void onInterfaceRemoved(@NonNull String ifName) { }
-
-    @Override
-    public void onInterfaceChanged(@NonNull String ifName, boolean up) { }
-
-    @Override
-    public void onInterfaceLinkStateChanged(@NonNull String ifName, boolean up) { }
-
-    @Override
-    public void onRouteChanged(boolean updated, @NonNull String route, @NonNull String gateway,
-            @NonNull String ifName) { }
-
-    @Override
-    public void onStrictCleartextDetected(int uid, @NonNull String hex) { }
-
-    @Override
-    public int getInterfaceVersion() {
-        return INetdUnsolicitedEventListener.VERSION;
-    }
-
-    @Override
-    public String getInterfaceHash() {
-        return INetdUnsolicitedEventListener.HASH;
-    }
-}

Tethering/src/com/android/networkstack/tethering/Tethering.java

@@ -93,7 +93,6 @@ import android.net.TetheringConfigurationParcel;
 import android.net.TetheringRequestParcel;
 import android.net.ip.IpServer;
 import android.net.shared.NetdUtils;
-import android.net.util.BaseNetdUnsolicitedEventListener;
 import android.net.util.InterfaceSet;
 import android.net.util.PrefixUtils;
 import android.net.util.SharedLog;
@@ -132,6 +131,7 @@ import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.MessageUtils;
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
+import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;