Add ability to import from Google Chrome Beta

Description

I just got Brave Browser and noticed that I couldn’t transfer my data from Google Chrome Beta. I should be able to!

Steps to Reproduce

1. Get Google Chrome Beta and set it up
2. Go to “brave://settings/importData” in Brave Browser
3. Click the dropdown. Google Chrome Beta isn’t in the list.

Actual result:

Google Chrome Beta isn’t in the list of browsers to transfer from.

Expected result:

Google Chrome Beta is in the list of browsers to transfer from.

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.21.74 Chromium: 89.0.4389.72 (Official Build) (64-bit)
Revision	3f345f156bfd157bd1bea06310e55f3fb2490359-refs/branch-heads/4389@{#1393}

Version/Channel Information:

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

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? N/A (Can’t transfer from Chrome to Chrome)

Miscellaneous Information:

[LaurenWags]

@stephendonner @MadhaviSeelam let’s be sure to check this one on Windows and macOS 👍🏻

[kjozwiak]

@bsclifton @rebron should we maybe move this to a P3 as we want users to have a seamless experience when migrating from other browsers? Maybe Chrome BETA doesn’t have the userbase as Chrome but assuming it’s still pretty big. Either way, I’m fine with P4 but figured we might want to get this fixed sooner than later as part of user retention efforts 👍

Might not be an easy task though as it looks like other browsers are struggling picking up other Chrome channels as well.