Amazon’s Echo devices are officially sharing your internet connection — unless you opted out, that is. The e-commerce giant’s shared low-bandwidth network Amazon Sidewalk, which launched on eligible Ring devices last year, began working off eligible Echo devices Tuesday. Ticker Security Last Change Change % AMZN AMAZON.COM, INC. 3,293.26 +29.15 +0.89% By pooling neighbors’ internet bandwidth, the company says, Amazon…