At Microsoft’s annual Surface press event today, the company announced the Surface Earbuds to rival Apple’s AirPods and Amazon’s newly announced Echo Buds. What’s unique about the Surface Earbuds is that, unlike the other two wireless earphones, they can be used with Alexa, Bixby, Google Assistant, Siri, or any other competitor — not just with Cortana. VentureBeat reports: Like the Surface…