Add support for `dev tools`

**Is your feature request related to a problem? Please describe.**
This is general user experience improvement feature request as most browsers don't have Dev tools and those that has Dev tools like kiwi are generally slow and laggy. Hence, it would be nice to have Dev tools in thorium android.

**Describe the solution you'd like, including relevant patches or source**
It's just a feature request for the app as it will improve user experience with having access to Dev tools to others who don't have a laptop or PC.

Enabling default Dev tools for chrome

**Additional Notes**
Here is a edited picture of said feature along with few others that's would be appreciated if added alongside Dev tools.

The issue names no files, tests, or entry points. Start by determining how Thorium Android is built and where Chrome developer tools are configured; clarify the supported Android behavior and verify the feature on a device.

Written by the indexing model from the issue text.