It's a foul, and at least a booking in the outfield 90% of the time, but it's also the kind of thing keepers routinely get away with. And with reason.
A keeper should only be sent off if he brings a player down cynically, or with an otherwise clear cut chance of scoring. If Rooney had knocked it passed him, then there'd be an argument. But a clumsy coming together, however much of a foul on the half way line, shouldn't be a red in the box unless the striker was denied an obvious advantage. Or taken out in full Kung Fu Cantona style...
Bravo was clumsy, but not malicious. It was far less of a shout than the Rashford call at the Etihad last season, at any rate.