Advanced setting to disable the built-in ENS resolver

**What problem are you trying to solve?**
When testing my own ENS resolver - the metamask chome extension always seems to get precedence in resolving ENS names, so I always have to disable Metamask completely before it queries my own DNS resolver. Could disabling the ENS resolver become an item in the advanced settings ?

**Describe the solution you'd like**
A setting to enable/disable the ENS resolver completely in the advanced settings.

The issue provides no file or test path. Start by locating the ENS resolver integration and the advanced-settings entry point, then trace how ENS lookups are selected. Done means users can disable the built-in ENS resolver from advanced settings so their own resolver is queried instead.

Written by the indexing model from the issue text.