Propagate EquivalentAddressGroup attributes to transports

Most of the changes are changing the signature of newClientTransport.
Since this is annoying, I choose to introduce a ClientTransportOptions
object to avoid the churn in the future.

With ClientTransportOptions in place, there's only a few lines necessary
of plumbing for the Attributes: add the field to ClientTransportOptions
and populate it in InternalSubchannel. There are no consumers of the
field in this commit.

1 files changed, 2 insertions, 1 deletions

diff --git a/testing/src/main/java/io/grpc/internal/testing/AbstractClientTransportFactoryTest.java b/testing/src/main/java/io/grpc/internal/testing/AbstractClientTransportFactoryTest.java
index b4b8772f5..b2578240b 100644
--- a/testing/src/main/java/io/grpc/internal/testing/AbstractClientTransportFactoryTest.java
+++ b/testing/src/main/java/io/grpc/internal/testing/AbstractClientTransportFactoryTest.java
@@ -40,6 +40,7 @@ public abstract class AbstractClientTransportFactoryTest {
     ClientTransportFactory transportFactory = newClientTransportFactory();
     transportFactory.close();
     transportFactory.newClientTransport(
-        new InetSocketAddress("localhost", 12345), "localhost:" + 12345, "agent", null);
+        new InetSocketAddress("localhost", 12345),
+        new ClientTransportFactory.ClientTransportOptions());
   }
 }