chore: release gapic-generator-java v1.0.12 (#457)

Committer: @miraleung
PiperOrigin-RevId: 378718217

Source-Link: googleapis/googleapis@08c4eeb

Source-Link: googleapis/googleapis-gen@9a27cb4

google-cloud-accessapproval/src/main/java/com/google/cloud/accessapproval/v1/stub/AccessApprovalStubSettings.java

@@ -250,6 +250,11 @@ public static String getDefaultEndpoint() {
     return "accessapproval.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "accessapproval.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -430,6 +435,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }