Collectibles: Hide account switcher in send flow

[J-Son89]

It might be good to fix this together with #20479

The account switcher in the collectibles account flow makes things a bit more complicated.

We should hide the account switcher when we know the user is trying to send a collectible.

For example here is one screen where it can cause this issue:

Please consider other entry points to the sending flow. when verifying this feature works.

[ulisesmac]

@J-Son89

Another options are:

1. To keep the account switcher, but make it unpressable
2. [I'd prefer this one] Make the account switcher pressable, but show only one account to switch:
   Example:
   
   Show the bottom sheet with only one option instead of two

My main concern with removing the account switcher is that it helps to know the account the user is using to send assets. Also I think it's better to keep consistent designs, some users may wonder why the account switcher disappeared.

wdyt?

[ulisesmac]

@J-Son89

Another options are:

1. To keep the account switcher, but make it unpressable

2. [I'd prefer this one] Make the account switcher pressable, but show only one account to switch:
   Example:
   <img alt="" height="600" src="https://private-user-images.githubusercontent.com/90291778/348396723-9a18678a-b1d0-41b4-9dff-ed47ebdfadca.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.b7npntOJD_rrmyKdK8S0MGWDqfN9Oqy96Nnt5Q-5oUc">
   Show the bottom sheet with only one option instead of two

My main concern with removing the account switcher is that it helps to know the account the user is using to send assets. Also I think it's better to keep consistent designs, some users may wonder why the account switcher disappeared.

wdyt?

This has been discused with the design team. The decision is to remove the account switcher, as the issue says

[J-Son89]

Thanks @ulisesmac !