If not using for a dryer anymore, it's probably best to install a new receptacle that matches the EVSE's plug. Or even go for a hard-wired installation.
If sharing, keep in mind that 14-30 receptacles weren't necessarily designed for frequent plug/unplug cycles. So starting off with a new high-quality receptacle might be a good idea. Check occasionally for warmth during charging. There are also "load-switcher" equipment that can allow both devices to be plugged in but deliver power to only one at a time. This adds convenience, protection, and reduces wear on the receptacles.
In our house we originally were going to go with a load-switcher approach but our city decided not to issue a permit for that, so we had to take another approach and were able to find a spare 20A for a separate circuit.