feat: NetworkController changes to support Network Syncing

[Prithpal-Sooriya]

Explanation

A set of changes to support network syncing.

References

N/A

Changelog

@metamask/network-controller

• ADDED: logic to use added network networkClientId if provided instead of uuidV4()
• : Your change here

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
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[Prithpal-Sooriya]

For custom RPCs, the networkClientId is a random UUID.
To make it easier for syncing, if a device is adding new networks from remote, we can reuse the UUID.

This was there is less chance of having some weird state where 2 devices use the same networks + RPCs, but they are different UUIDs.

[Prithpal-Sooriya]

This is mostly optional (to keep uuid eventual consistency) across devices.