## Description
Switches all usages of `kotlinx.coroutines.Dispatchers` to
`WholphinDispatchers`.
`WholphinDispatchers` provides an easier and more reliable mechanism to
use a test dispatcher in unit tests. For regular app usage,
`WholphinDispatchers` just delegates to `Dispatchers`.
There are no user facing changes
### Related issues
None
### Testing
Basic emulator testing & unit tests
## Screenshots
N/A
## AI or LLM usage
None
