fix: update gapic-generator-java with mock service generation fixes (g…

…oogleapis#846)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 457524730

Source-Link: googleapis/googleapis@917e7f2

Source-Link: https://github.com/googleapis/googleapis-gen/commit/2497f9a069d3f6b2d6810d5a4e239cda1e7e5a39
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMjQ5N2Y5YTA2OWQzZjZiMmQ2ODEwZDVhNGUyMzljZGExZTdlNWEzOSJ9

java-document-ai/google-cloud-document-ai/src/main/java/com/google/cloud/documentai/v1/DocumentProcessorServiceClient.java

@@ -16,6 +16,7 @@
 
 package com.google.cloud.documentai.v1;
 
+import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.httpjson.longrunning.OperationsClient;
 import com.google.api.gax.longrunning.OperationFuture;
@@ -188,6 +189,7 @@ public final com.google.longrunning.OperationsClient getOperationsClient() {
    * Returns the OperationsClient that can be used to query the status of a long-running operation
    * returned by another API method call.
    */
+  @BetaApi
   public final OperationsClient getHttpJsonOperationsClient() {
     return httpJsonOperationsClient;
   }

java-document-ai/google-cloud-document-ai/src/main/java/com/google/cloud/documentai/v1beta3/DocumentProcessorServiceClient.java

@@ -199,6 +199,7 @@ public final com.google.longrunning.OperationsClient getOperationsClient() {
    * Returns the OperationsClient that can be used to query the status of a long-running operation
    * returned by another API method call.
    */
+  @BetaApi
   public final OperationsClient getHttpJsonOperationsClient() {
     return httpJsonOperationsClient;
   }