DOH Ipfs override may cause high cpu usage

[cypt4]

There is a report from @aseren where he got high cpu usage on macos when closed the browser.
Sampling pointed to the doh override network service listener. Seems network service was down and didn't wake up.
So throttling needed when try to reconnect to network manager.

[kjozwiak]

The above will require 1.43.81 or higher for 1.43.x verification.

[stephendonner]

Verification PASSED using

Brave	1.43.81 Chromium: 104.0.5112.102 (Official Build) (x86_64)
Revision	8e5396254975ef939f2ef7d0bd334e48a052b536-refs/branch-heads/5112@{#1478}
OS	macOS Version 13.0 (Build 22A5321d)

Steps:

1. installed 1.43.81
2. launched Brave
3. loaded brave://ipfs-internals
4. clicked on Install and start
5. opened Window -> Task Manager
6. selected Utility: Network Service
7. clicked on End Process
8. opened brave://settings/security and made sure With Cloudflare (1.1.1.1) was selected
9. loaded ipns://en.wikipedia-on-ipfs.org

Confirmed it loaded ipns://en.wikipedia-on-ipfs.org/wiki/ with a new Utility: Network Service process (Old: 4163, New: 4314)

example	example	example	example

[stephendonner]

Verified PASSED using

Brave 1.43.86, Chromium 105.0.5195.68 running Android 9 on a Google Pixel XL.

Confirmed no crashes, and (apart from the occasional HTTP 504 from the servers), I could load all the pages.

Steps:

1. installed 1.43.86
2. launched Brave
3. set OpenDNS for Choose another provider, in Settings -> Brave Shields & privacy -> Use secure DNS
4. loaded sample test sites

Ran through the following URLs:

• ipfs://bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/wiki/Vincent_van_Gogh.html
• ipfs://bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi/
• ipns://brad.crypto
• ipns://ipfs.io

DoH setting	ipfs://...van_Gogh.html	ipfs://...55fbzdi/	ipns://brad.crypto	ipns://ipfs.io

Ran through https://github.com/brave/qa-resources/blob/82e6e8dd508f87595b20c4bbde093cd80d124dbe/wikitemplate-IPFS.md#ipfs-on-android, additionally 👍

Logged #25103.