Don't go disconnected state while changing region

[simonhong]

Description

Steps to Reproduce

1. Set purchased state
2. Connect to any region
3. Change to another region

Actual result:

Screen.Recording.2022-12-09.at.1.33.20.PM.mov

Expected result:

Screen.Recording.2022-12-09.at.1.34.35.PM.mov

Reproduces how often:

Easily

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[kjozwiak]

The above requires 1.47.130 or higher for 1.47.x verification 👍

[stephendonner]

Verified PASSED using

Brave	1.47.132 Chromium: 108.0.5359.128 (Official Build) beta (x86_64)
Revision	1cd27afdb8e5d057070c0961e04c490d2aca1aa0-refs/branch-heads/5359@{#1185}
OS	macOS Version 11.7.2 (Build 20G1020)

Followed the steps to reproduce in the description.

Confirmed when changing regions while connected, it goes Connected -> Disconnecting... -> Connecting... -> Connected