[Bug]: http-client-java, mock data as JSON string need to have double quote on its value, for BinaryData

[weidongxu-microsoft]

Describe the bug

For mock data as JSON string, it should have double quote, e.g. "mock_value" for the value of BinaryData as string.

Reproduction

source Azure/azure-sdk-for-java#47934

Checklist

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• The provided reproduction is a minimal reproducible example of the bug.