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

…a to 2.18.1 (#832)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: googleapis/googleapis-gen@9f6775c
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOWY2Nzc1Y2FiMTk1ODk4MmI4ODk2N2E0M2U1ZTgwNmFmMGYxMzVkYiJ9

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1/SecurityCenterClient.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;
@@ -137,7 +136,6 @@ public static final SecurityCenterClient create(SecurityCenterSettings settings)
    * Constructs an instance of SecurityCenterClient, using the given stub for making calls. This is
    * for advanced usage - prefer using create(SecurityCenterSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final SecurityCenterClient create(SecurityCenterStub stub) {
     return new SecurityCenterClient(stub);
   }
@@ -153,7 +151,6 @@ protected SecurityCenterClient(SecurityCenterSettings settings) throws IOExcepti
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected SecurityCenterClient(SecurityCenterStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -164,7 +161,6 @@ public final SecurityCenterSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub getStub() {
     return stub;
   }

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1/stub/SecurityCenterStubSettings.java

@@ -912,7 +912,6 @@ public UnaryCallSettings<DeleteBigQueryExportRequest, Empty> deleteBigQueryExpor
     return listBigQueryExportsSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1beta1/SecurityCenterClient.java

@@ -137,7 +137,6 @@ public static final SecurityCenterClient create(SecurityCenterSettings settings)
    * Constructs an instance of SecurityCenterClient, using the given stub for making calls. This is
    * for advanced usage - prefer using create(SecurityCenterSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final SecurityCenterClient create(SecurityCenterStub stub) {
     return new SecurityCenterClient(stub);
   }
@@ -153,7 +152,6 @@ protected SecurityCenterClient(SecurityCenterSettings settings) throws IOExcepti
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected SecurityCenterClient(SecurityCenterStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -164,7 +162,6 @@ public final SecurityCenterSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub getStub() {
     return stub;
   }

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1beta1/stub/SecurityCenterStubSettings.java

@@ -538,7 +538,6 @@ public UnaryCallSettings<UpdateSourceRequest, Source> updateSourceSettings() {
     return updateSecurityMarksSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1p1beta1/SecurityCenterClient.java

@@ -138,7 +138,6 @@ public static final SecurityCenterClient create(SecurityCenterSettings settings)
    * Constructs an instance of SecurityCenterClient, using the given stub for making calls. This is
    * for advanced usage - prefer using create(SecurityCenterSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final SecurityCenterClient create(SecurityCenterStub stub) {
     return new SecurityCenterClient(stub);
   }
@@ -154,7 +153,6 @@ protected SecurityCenterClient(SecurityCenterSettings settings) throws IOExcepti
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected SecurityCenterClient(SecurityCenterStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -165,7 +163,6 @@ public final SecurityCenterSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub getStub() {
     return stub;
   }

google-cloud-securitycenter/src/main/java/com/google/cloud/securitycenter/v1p1beta1/stub/SecurityCenterStubSettings.java

@@ -674,7 +674,6 @@ public UnaryCallSettings<UpdateSourceRequest, Source> updateSourceSettings() {
     return updateSecurityMarksSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public SecurityCenterStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()