chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-jav…

…a to 2.18.1 (#53)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: https://github.com/googleapis/googleapis-gen/commit/9f6775cab1958982b88967a43e5e806af0f135db
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOWY2Nzc1Y2FiMTk1ODk4MmI4ODk2N2E0M2U1ZTgwNmFmMGYxMzVkYiJ9

java-video-live-stream/google-cloud-live-stream/src/main/java/com/google/cloud/video/livestream/v1/LivestreamServiceClient.java

@@ -18,7 +18,6 @@
 
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.longrunning.OperationFuture;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
@@ -135,7 +134,6 @@ public static final LivestreamServiceClient create(LivestreamServiceSettings set
    * Constructs an instance of LivestreamServiceClient, using the given stub for making calls. This
    * is for advanced usage - prefer using create(LivestreamServiceSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final LivestreamServiceClient create(LivestreamServiceStub stub) {
     return new LivestreamServiceClient(stub);
   }
@@ -151,7 +149,6 @@ protected LivestreamServiceClient(LivestreamServiceSettings settings) throws IOE
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected LivestreamServiceClient(LivestreamServiceStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -162,7 +159,6 @@ public final LivestreamServiceSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public LivestreamServiceStub getStub() {
     return stub;
   }

java-video-live-stream/google-cloud-live-stream/src/main/java/com/google/cloud/video/livestream/v1/stub/LivestreamServiceStubSettings.java

@@ -451,7 +451,6 @@ public UnaryCallSettings<DeleteEventRequest, Empty> deleteEventSettings() {
     return deleteEventSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public LivestreamServiceStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()