feat: add EncryptionConfiguration to TransferConfig

---
feat: Add List type to Data source parameter.
PiperOrigin-RevId: 552543247

google/cloud/bigquery/datatransfer/v1/datatransfer.proto

@@ -263,6 +263,9 @@ message DataSourceParameter {
 
     // Page ID for a Google+ Page.
     PLUS_PAGE = 6;
+
+    // List of strings parameter.
+    LIST = 7;
   }
 
   // Parameter identifier.
@@ -861,11 +864,16 @@ message StartManualTransferRunsRequest {
   // The requested time specification - this can be a time range or a specific
   // run_time.
   oneof time {
-    // Time range for the transfer runs that should be started.
+    // A time_range start and end timestamp for historical data files or reports
+    // that are scheduled to be transferred by the scheduled transfer run.
+    // requested_time_range must be a past time and cannot include future time
+    // values.
     TimeRange requested_time_range = 3;
 
-    // Specific run_time for a transfer run to be started. The
-    // requested_run_time must not be in the future.
+    // A run_time timestamp for historical data files or reports
+    // that are scheduled to be transferred by the scheduled transfer run.
+    // requested_run_time must be a past time and cannot include future time
+    // values.
     google.protobuf.Timestamp requested_run_time = 4;
   }
 }

google/cloud/bigquery/datatransfer/v1/transfer.proto

@@ -20,6 +20,7 @@ import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
 import "google/protobuf/struct.proto";
 import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
 import "google/rpc/status.proto";
 
 option csharp_namespace = "Google.Cloud.BigQuery.DataTransfer.V1";
@@ -207,6 +208,19 @@ message TransferConfig {
   // transfer data. Populated only for `transferConfigs.get` requests. In case
   // the user information is not available, this field will not be populated.
   optional UserInfo owner_info = 27 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // The encryption configuration part. Currently, it is only used for the
+  // optional KMS key name. The BigQuery service account of your project must be
+  // granted permissions to use the key. Read methods will return the key name
+  // applied in effect. Write methods will apply the key if it is present, or
+  // otherwise try to apply project default keys if it is absent.
+  EncryptionConfiguration encryption_configuration = 28;
+}
+
+// Represents the encryption configuration for a transfer.
+message EncryptionConfiguration {
+  // The name of the KMS key used for encrypting BigQuery data.
+  google.protobuf.StringValue kms_key_name = 1;
 }
 
 // Represents a data transfer run.