api,netty: fix MethodDescriptor and InternalKnownTransport for netty-shaded (backport v1.28.x)

api/src/main/java/io/grpc/InternalKnownTransport.java

@@ -24,6 +24,7 @@
 @Internal
 public enum InternalKnownTransport {
   NETTY,
+  NETTY_SHADED,
   ;
 }
 

api/src/main/java/io/grpc/MethodDescriptor.java

@@ -51,8 +51,7 @@ public final class MethodDescriptor<ReqT, RespT> {
 
   // Must be set to InternalKnownTransport.values().length
   // Not referenced to break the dependency.
-  private final AtomicReferenceArray<Object> rawMethodNames = new AtomicReferenceArray<>(1);
-
+  private final AtomicReferenceArray<Object> rawMethodNames = new AtomicReferenceArray<>(2);
 
   /**
    * Gets the cached "raw" method name for this Method Descriptor.  The raw name is transport

netty/src/main/java/io/grpc/netty/NettyClientStream.java

@@ -54,7 +54,9 @@
  */
 class NettyClientStream extends AbstractClientStream {
   private static final InternalMethodDescriptor methodDescriptorAccessor =
-      new InternalMethodDescriptor(InternalKnownTransport.NETTY);
+      new InternalMethodDescriptor(
+          NettyClientTransport.class.getName().contains("grpc.netty.shaded")
+              ? InternalKnownTransport.NETTY_SHADED : InternalKnownTransport.NETTY);
 
   private final Sink sink = new Sink();
   private final TransportState state;