WebSocketModule uses OkHttpClientProvider (facebook#55885)

Summary:
Pull Request resolved: facebook#55885

Instead of creating a brand-new OkHttpClient.Builder() per WebSocket
connection, derive from OkHttpClientProvider.getOkHttpClient() so
that all connections share the same connection pool and dispatcher.

Also remove the dispatcher shutdown call, since the dispatcher is now
shared with the global OkHttpClient and shutting it down would kill
all connections.

Changelog: [Internal]

Reviewed By: cipolleschi, javache

Differential Revision: D95059116

Author: cortinico

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.kt

@@ -22,6 +22,7 @@ import com.facebook.react.common.ReactConstants
 import com.facebook.react.module.annotations.ReactModule
 import com.facebook.react.modules.network.CustomClientBuilder
 import com.facebook.react.modules.network.ForwardingCookieHandler
+import com.facebook.react.modules.network.OkHttpClientProvider
 import java.io.IOException
 import java.net.URI
 import java.net.URISyntaxException
@@ -80,7 +81,8 @@ public class WebSocketModule(context: ReactApplicationContext) :
   ) {
     val id = socketID.toInt()
     val okHttpBuilder =
-        OkHttpClient.Builder()
+        OkHttpClientProvider.getOkHttpClient()
+            .newBuilder()
             .connectTimeout(10, TimeUnit.SECONDS)
             .writeTimeout(10, TimeUnit.SECONDS)
             .readTimeout(0, TimeUnit.MINUTES) // Disable timeouts for read
@@ -198,9 +200,6 @@ public class WebSocketModule(context: ReactApplicationContext) :
           }
         },
     )
-
-    // Trigger shutdown of the dispatcher's executor so this process can exit cleanly
-    client.dispatcher().executorService().shutdown()
   }
 
   override fun close(code: Double, reason: String?, socketID: Double) {