I am no expert so I'm not saying definitly eat them (as if you would eat them because I said so!) but they look like cherries, the stems and grouping look like cherries, and the bArk looks like cherry. I would cut one open and see if it smells like a cherry and has a pit. I would also do what mushroom foragers like me do and look up if it has a poisenous look-alike. My guess is its a dwarf cherry or wild cherry. What would give me the most confidence is if Near the bottom of the tree you could find a graft, then you would know it was cultivated.