Use the RuntimeTenant API instead of comparing the service id to a string.

Reviewed By: joshkehn

Differential Revision: D90247290

fbshipit-source-id: 4d1a5f880710401c18bf4ef0547ae51a7f4c23e1

Author: Flameeyes

third-party/thrift/src/thrift/lib/hack/src/contextprop/ThriftContextPropHandlers.php

@@ -40,7 +40,7 @@ public static function install(
             MCPProductID::L4_ADS_MANAGER
         ) &&
         (
-          Environment::getServiceId() == 'web_ads_manager/hhvm' ||
+          RuntimeTenant::isAdsManagerTenant() ||
           Environment::isAsyncEnvironment()
         ) &&
         JustKnobs::evalString(