feat:Enable RunQueryResponse.done (#1712)

* feat:Enable RunQueryResponse.done

PiperOrigin-RevId: 444879243

Source-Link: googleapis/googleapis@c4b98bf

Source-Link: googleapis/googleapis-gen@497ddcd
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dev/protos/google/firestore/v1/firestore.proto

@@ -523,6 +523,15 @@ message RunQueryResponse {
   // The number of results that have been skipped due to an offset between
   // the last response and the current response.
   int32 skipped_results = 4;
+
+  // The continuation mode for the query. If present, it indicates the current
+  // query response stream has finished. This can be set with or without a
+  // `document` present, but when set, no more results are returned.
+  oneof continuation_selector {
+    // If present, Firestore has completely finished the request and no more
+    // documents will be returned.
+    bool done = 6;
+  }
 }
 
 // The request for [Firestore.PartitionQuery][google.firestore.v1.Firestore.PartitionQuery].