Mobile Trade: Enable network via trade account select

[vytick]

Enable network and discover accounts via trade when selecting account of not enabled networks.

The UI is already done in module-add-account flow (AddCoinDiscoveryRunningScreen and AddCoinDiscoveryFinishedScreen). We need to extract the functionality and make it reusable in from a new package.

Figma design

[vytick]

@trezor/qa:

Since this contains some minor changes to add account flow, please, retest that adding a new account works in all use cases as before:

1. When user has discovered coin, he can add a new account
2. If there are multiple types allowed, he can only add a new account of a type (e.g. another BTC segwit account) if there is no empty account of this network and a type.
3. If network is not discovered, during this flow it should discover all used accounts and also allow user to add a new account of each type (given that rules in 2. allow it)
4. In Trade section, when user picks asset to be bought (e.g. BTC) he can also add new account (rules in 2. apply)
5. If the network of selected asset in 4. was not enabled before, user can add new account and it will enable the network and discover all accounts. User can then pick one of those or add a new on (as described in 4.)
6. When device is not connected or the device is Portfolio account, adding new account should not work

[STew790]

QA OK

1. OK
2. OK
3. OK (rules from 2. applies)
4. OK (Rules from 2. applies)
5. OK (accounts from network are discovered and user can pick the same as in 4.)
6. OK (cant add new account, do we really need the trad tab in portfolio btw? 🤔 )

Info
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