Change quick answer search client ID to QUICK_ANSWERS_CROS.

Bug: b/146018217
Test: manual
Change-Id: Iadbaa847c3aef7f78cbecf44d0d50e64aacca4c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1970262Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Li Lin <llin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728752}

chromeos/components/quick_answers/search_result_loader.cc

@@ -70,8 +70,7 @@ constexpr base::StringPiece kQueryKey = "query";
 constexpr base::StringPiece kRawQueryKey = "rawQuery";
 constexpr base::StringPiece kClientTypeKey = "clientType";
 constexpr base::StringPiece kClientIdKey = "clientId";
-// TODO(llin): Update the client type after finalize on the client type.
-constexpr base::StringPiece kClientType = "EXPERIMENTAL";
+constexpr base::StringPiece kClientType = "QUICK_ANSWERS_CROS";
 
 std::string BuildSearchRequestPayload(const std::string& selected_text) {
   Value payload(Value::Type::DICTIONARY);