chore: update gapic-generator-java version to 2.1.0 (#968)

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PiperOrigin-RevId: 391407209
Source-Link: googleapis/googleapis@e1738ee

gapic-google-cloud-storage-v2/src/main/java/com/google/storage/v2/stub/StorageStubSettings.java

@@ -157,7 +157,9 @@ public static List<String> getDefaultServiceScopes() {
 
   /** Returns a builder for the default credentials for this service. */
   public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+    return GoogleCredentialsProvider.newBuilder()
+        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
+        .setUseJwtAccessWithScope(true);
   }
 
   /** Returns a builder for the default ChannelProvider for this service. */

synth.metadata

@@ -11,7 +11,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "eb7c9d1c3915851dd8b357ee950e0467490bce34"
+        "sha": "e1738ee972b49fd0c4d4718b035444495142b781",
+        "internalRef": "391407209"
       }
     },
     {