Hardcoded ENS usernames should be replaced

[churik]

Bug Report

Problem

Follow up on #13660 (comment)

From @3esmit:
Regarding ENS names...
I see that hardcoding the address of ENS Usernames in goerli was needed, but this is wrong. ENS Usernames is a subset of ENS, and ENS will lookup the ENS Usernames contract by looking the controller of stateofus.eth, which is the address that can create subdomains, therefore is ENS Usernames contract with an ABI to register an username.
So, the only thing hardcoded should be ENS address. With that, the app should do it only once at first run a request to find the controller of stateofus.eth and cache this information. The cache needs to be updated only in case estimating gas to registering an username is throwing an exception, than the cache should be updated only once a day until it finds a working address - waku can be used to notify for updates, if coming from an authority (Status devs).