api: remove experimentalApi setting from proxyDetector and related classes (#10216)

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

@@ -28,7 +28,6 @@ import javax.annotation.Nullable;
 /**
  * An {@link ProxiedSocketAddress} for making a connection to an endpoint via an HTTP CONNECT proxy.
  */
-@ExperimentalApi("https://github.com/grpc/grpc-java/issues/5279")
 public final class HttpConnectProxiedSocketAddress extends ProxiedSocketAddress {
   private static final long serialVersionUID = 0L;
 

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

@@ -517,7 +517,6 @@ public abstract class ManagedChannelBuilder<T extends ManagedChannelBuilder<T>>
    * @return this
    * @since 1.19.0
    */
-  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/5113")
   public T proxyDetector(ProxyDetector proxyDetector) {
     throw new UnsupportedOperationException();
   }

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

@@ -22,7 +22,6 @@ import java.net.SocketAddress;
  * An address that contains the information about making a connection via a proxy.  It is created by
  * a {@link ProxyDetector}.
  */
-@ExperimentalApi("https://github.com/grpc/grpc-java/issues/5279")
 public abstract class ProxiedSocketAddress extends SocketAddress {
   private static final long serialVersionUID = 0L;
 }

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

@@ -46,7 +46,6 @@ import javax.annotation.Nullable;
  * Netty transport and the OkHttp transport currently only support {@link
  * HttpConnectProxiedSocketAddress} which is returned by the default {@code ProxyDetector}.
  */
-@ExperimentalApi("https://github.com/grpc/grpc-java/issues/5279")
 public interface ProxyDetector {
   /**
    * Given a target address, returns a proxied address if a proxy should be used. If no proxy should