sync "No internet connection" error dialog should be general error dialog

[sudokai]

Description

On Linux, Brave Sync shows the error message "No internet connection. Please try again when your connection is available." even though there is a working internet connection.

Steps to Reproduce

1. Sync.
2. Start a new Sync Chain
3. "No internet connection. Please try again when your connection is available."

Actual result:

"No internet connection. Please try again when your connection is available."

Expected result:

Sync works.

Reproduces how often:

Always

Brave version (brave://version info)

Brave	0.59.35 Chromium: 72.0.3626.81 (Official Build) (64-bit)
Revision	ac8b982e05014492d1bd7d317628a4f22a97ffa0-refs/branch-heads/3626@{#796}
OS	Linux

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds? I don't know.

Website problems only:

• Does the issue resolve itself when disabling Brave Shields? No
• Is the issue reproducible on the latest version of Chrome? No

[srirambv]

Does this happen even after relaunching browser? Could you try launching via terminal and see if it logs any error when you see this?

[mrose17]

When i re-launched the browser, the problem went away.

If i leave the sync chain, restart the browser, and then enter the code, it works.

good luck debugging this!

[GeetaSarvadnya]

Verification passed on

Brave	0.61.41 Chromium: 73.0.3683.39 (Official Build) beta (64-bit)
Revision	cc53b0e12fcaf42e4bab8d6c23bd4fb7aae99f6c-refs/branch-heads/3683@{#413}
OS	Linux mint

• Verified the STR from Sync revert network connection tracker brave-core#1643