StartWallet is the function exposed to the mobile device to start the bchwallet. configPath is the path to the bchwallet.conf file that should be saved on your mobile device.
Make sure you save in the config file the correct path on the device to use for `appdata`. You will likely also want to the `noinitalload` option to prevent the wallet from blocking startup as it waits for input from stdin.
Once the wallet is started you will want to control it using the gRPC API. A `CreateWallet` RPC is available which you will need to call first.
StopWallet will stop the wallet and perform a clean shutdown.