Add escrow file import validation logic

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=129116064

java/google/registry/config/ConfigModule.java

@@ -314,6 +314,15 @@ public final class ConfigModule {
     return projectId + "-rde";
   }
 
+  /**
+   * Returns the Google Cloud Storage bucket for importing escrow files.
+   */
+  @Provides
+  @Config("rdeImportBucket")
+  public String provideRdeImportBucket(@Config("projectId") String projectId) {
+    return projectId + "-rde-import";
+  }
+
   /**
    * Size of Ghostryde buffer in bytes for each layer in the pipeline.
    *