Avoid double-copying in serialize(View<const T, DeviceSpace>)

[PhilMiller]

We have full-View-size bounce buffer serialization to handle Views with each of const element type and whose contents live in host-inaccessible device memory space (e.g. CudaSpace sans UVM). It looks like the code as currently written may naively allocate a mirror and copy the whole View to unwrap each of these.

Given that we're potentially serializing View<T const> already, I don't think we need to worry about the underlying storage not actually being writable. So, I think the right solution to this would be to not copy View<T const>, but rather to just alias it by an equivalent View<T>