Function select_random_address 

fn select_random_address(
    current: Address,
    test_runner: &mut TestRunner,
    state: &EvmFuzzState,
    senders: Option<&SenderFilters>,
) -> Option<Address>

Selects a random address for mutation, respecting sender filters if provided.

Priority:

1. If senders has targeted addresses, pick randomly from those
2. Otherwise, pick from the dictionary state values (excluding any in senders.excluded)
3. Returns None if no suitable address is found or if the selected address equals current