inprocess: Add missing anonymous address as supported

Author: ejona86

inprocess/src/main/java/io/grpc/inprocess/InProcessChannelBuilder.java

@@ -33,8 +33,8 @@
 import io.grpc.internal.ManagedChannelImplBuilder.ClientTransportFactoryBuilder;
 import io.grpc.internal.SharedResourceHolder;
 import java.net.SocketAddress;
+import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Nullable;
@@ -289,7 +289,7 @@ public void close() {
 
     @Override
     public Collection<Class<? extends SocketAddress>> getSupportedSocketAddressTypes() {
-      return Collections.singleton(InProcessSocketAddress.class);
+      return Arrays.asList(InProcessSocketAddress.class, AnonymousInProcessSocketAddress.class);
     }
   }
 }