Revert vpn change for restore button (uplift to 1.57.x)

[brave-builds]

Uplift of #19514
Resolves brave/brave-browser#31526

Pre-approval checklist:

• You have tested your change on Nightly.
• This contains text which needs to be translated.
  • There are more than 7 days before the release.
  • I've notified folks in #l10n on Slack that translations are needed.
• The PR milestones match the branch they are landing to.

Pre-merge checklist:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.

Post-merge checklist:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[hffvld]

Verified on Pixel 6 and Pixel 7 using version(s):

Device/OS: 
- Pixel 6 [oriole-user 13 TQ3A.230705.001 release-keys]
- Pixel 7 [panther_beta-user 14 UPB4.230623.007 release-keys]
Brave build: 1.58.80
Chromium: 116.0.5845.51 (Official Build) canary (64-bit)
Revision: 4408cc9795df260c5d5f033660ce757782b53b32

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STEPS:

1. Fresh install Brave > Launch it
2. Set VPN staging server through QA des settings
3. Three-dot menu > Brave VPN > Observe Restore button
4. Tap it > Install VPN profile > Verify
5. Go back to the VPN screen > Purchase subscription > Enable VPN
6. Uninstall and then reinstall the same Brave build
7. Enable VPN settings through QA dev settings again
8. Three-dot menu > Brave VPN > Tap Restore > Install VPN profile > Verify

ACTUAL RESULTS:

• Verified that Restore button is always appearing via the VPN menu
• Verified that the user goes through the correct flow if tapped on Restore and there's no current subscription
• Verified that it restores the VPN subscription if a user has one enabled on Android on multiple devices using Restore

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Restore when no active VPN subscription

timestamp_13-59-19_14-00-07.mp4

Restore when active VPN subscription

timestamp_14-03-04_14-04-55.mov

Activating VPN subscription from another device

2023-08-09_14-36-27.mp4

[kjozwiak]

Uplift into 1.57,x approved 👍