Britain’s 90-year-old monarch has made a rare foray into political affairs, being caught on film characterizing Chinese officials as “very rude” in their dealings with British counterparts during a state visit last year. Queen Elizabeth II made the unguarded comments Tuesday while talking to a senior police officer at a rain-soaked garden party on the grounds of Buckingham Palace. With uncharacteristic bluntness — rarely if ever heard in public — the queen said the Chinese had not dealt properly with Barbara Woodward, the British envoy to China. “They were very rude to the ambassador,” Elizabeth said. …