Selected network controller should update all domains when feature flag is off

[BelfordZ]

Explanation

When the feature flag for per dapp network is turned off, we should keep all the proxies for all the domains in sync. To do that, we add some code to the end of the function used to set network client id for a given domain. When the user is setting the domain for 'metamask', and when the feature flag is off, we do the update to all the domains, not just metamask.

References

Changelog

@metamask/selected-network-controller

• CHANGED: NetworkClientId for each domain will be the same as metamask when the feature flag is off

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate