Make log_on_drop more convienient to disable

[FireDasher]

All programs will end eventually, so I think it's beneficial to be able to disable log_on_drop without making your stream mutable.

Before:

let mut handle = rodio::DeviceSinkBuilder::open_default_sink().unwrap();
handle.log_on_drop(false);

After:

let handle = rodio::DeviceSinkBuilder::open_default_sink().unwrap().disable_log_on_drop();

(The old method still works for backwards compatibility)