Allow account restore API to specify if cold staking accounts should be restored

[sondreb]

Add an option to the recover API like below to allow users to specify if they want to restore the "coldStakingColdAddresses" and "coldStakingHotAddresses" accounts. It will default to false, so it must be explicit be provided for future wallet implementations that relies on the node.

This is done because accounts cannot be removed after created, and they are blocking a restored recovery phrase to enable cold staking (not allowed to activate when both accounts are created on the wallet).

[dangershony]

Hmm come to think about it you can still create a new wallet on the same node for recovery of coldstaking no?

[sondreb]

I'm not sure why we have both an create and restore API, when you can supply the recovery phrase (mnemonic) on the create method. You can create a new wallet on the same node, but restoring will restore both coldStakingColdAddresses and coldStakingHotAddresses, which will then disallow activating cold staking later on.