Description

Followup to #15009. This will affect confirmations and custom headers. We also add the flag to stats requests because that may be affected too, as they ping the same host.

Steps to Reproduce

Boot the browser and custom headers and finalization may not occur on Android due to a network change

Reproduces how often:

Always on simulator, often on actual device

Brave version (info found on brave://version)

Version/Channel Information:

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

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: