A federal budget proposal brought good news Wednesday for Minnesota’s medical device companies by freezing for two years a tax on products like pacemakers and ventilators that they have long opposed. The package of tax cuts and spending cued up for final votes in Congress this week would suspend the 2.3% excise tax on those devices, ultrasound machines and more that took effect in 2013 as part of the funding mechanism for President Barack Obama’s health care law.