Make buffer_map and buffer_unmap check for device validity, add tests. #4212
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Checklist
cargo clippy
.cargo clippy --target wasm32-unknown-unknown
if applicable.Connections
Description
This patch makes buffer_unmap check for a valid device, and corrects buffer_map to return the appropriate error for an invalid device. It also adds device validity checks to device_maintain_ids and to the functions that get and set buffer sub data.
Testing
Tests are added in device.rs checking buffer map and unmap for device validity errors.