arc: Use ChromeOS host's IP address for WiFi ADB

Wireless debugging in ARC shows guest IP address
which is not routable from the local network for
other devices.

This patch updates the shown IP address to host's
IP address. This allows clients to know the correct
IP address to connect to.

The IP address used is taken from wifi IP of the
host set in a property:
'vendor.arc.net.ipv4.host_wifi_address'.

ARC R patch: ag/12907009

Bug: 169703040
Bug: 315430652
Test: Manually tested for ARC on tm-arc.
Change-Id: Ib66e84872d9004fa3a946f1af9a774709d048f5a

src/com/android/settings/development/AdbIpAddressPreferenceController.java

@@ -22,8 +22,10 @@ import android.net.ConnectivityManager;
 import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.wifi.WifiManager;
+import android.os.Build;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.SystemProperties;
 import android.util.Log;
 
 import androidx.preference.Preference;
@@ -100,12 +102,23 @@ public class AdbIpAddressPreferenceController extends AbstractConnectivityPrefer
     }
 
     public String getIpv4Address() {
+        // ARC specific - from here
+        // Get the host's Wi-Fi IP address instead of guest's IP.
+        if (Build.IS_ARC) {
+            final String[] addrs =
+                    SystemProperties.get("vendor.arc.net.ipv4.host_wifi_address").split(",");
+            // ADB over Wi-Fi uses the first available available network configuration.
+            if (addrs.length > 0) {
+                return addrs[0];
+            }
+        }
+        // ARC specific - till here.
         return getDefaultIpAddresses(mCM);
     }
 
     @Override
     protected void updateConnectivity() {
-        String ipAddress = getDefaultIpAddresses(mCM);
+        String ipAddress = getIpv4Address();
         if (ipAddress != null) {
             int port = getPort();
             if (port <= 0) {