Fixes upgrade from 0.63.x to 1.3.x AC switch OFF and wallet creation failed

[tmancey]

Fixes brave/brave-browser#7833

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
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• Add appropriate QA labels (QA/Yes or QA/No) to include the closed issue in milestone
• Public documentation has been updated as necessary. For instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protection-Mode
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-compatibility-issues-with-tracking-protection
  • https://github.com/brave/brave-browser/wiki/QA-Guide

Test Plan:

See brave/brave-browser#7833 (resets Ads viewed count to zero is a known issue and was agreed that migration would not be attempted for brave/brave-browser#4047)

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions
• Verify test plan is specified in PR before merging to source

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on.
• All relevant documentation has been updated.

[emerick]

LGTM, just a minor whitespace nit.

[emerick]

Really minor, but maybe a space after the &?

[bsclifton]

CI run was completely green 🎉 I did a quick commit to address that nit, @emerick 😄 Should be ready to merge!

[tmancey]

Sanity tests of fix #4449 have shown that users who experienced this issue will have their data recovered after upgrading as long the user did not try to re-enable Brave Rewards. If a user did re-enable Rewards before upgrading to this fix then the wallet will be corrupted and is non-recoverable.

Sanity testing was from 0.63.55 to 1.3, 1.4 and 1.5, however, we should test other scenarios.

As a side note P3A is broken for wallet creation as it still references Probi etc. which does not exist in the JSON feed. I will raise a separate issue for this.

[LaurenWags]

Verified using

Brave	1.5.69 Chromium: 79.0.3945.130 (Official Build) nightly (64-bit)
Revision	e22de67c28798d98833a7137c0e22876237fc40a-refs/branch-heads/3945@{#1047}
OS	macOS Version 10.14.6 (Build 18G103)

PASS Upgrading without hitting the issue first:

1. 0.63.55

   • Install above version.
   • Enable Rewards, view an ad
   • Close. Rename profile to Nightly.
   • Launch 1.5.69
   • Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected

2. 0.64.77

   • Install above version.
   • Enable Rewards, view an ad
   • Close. Rename profile to Nightly.
   • Launch 1.5.69
   • Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected

PASS Upgrading after hitting the issue first:
3. 0.63.55

• Install above version.
• Enable Rewards, view an ad
• Close. Rename profile to Nightly. Download Nightly 1.5.53.
• Launch 1.5.53 --> see issue but don't do anything.
• Close. Update to 1.5.69 on Nightly and relaunch.
• Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected

4. 0.64.77
   • Install above version.
   • Enable Rewards, view an ad
   • Close. Rename profile to Nightly. Download Nightly 1.5.53.
   • Launch 1.5.53 --> see issue but don't do anything.
   • Close. Update to 1.5.69 on Nightly and relaunch.
   • Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected

Note - see #4449 (comment) for additional information

PASS Sanity check of other upgrades:
5. 0.69.135

• Install above version.
• Enable Rewards, view an ad
• Close. Rename profile to Nightly.
• Launch 1.5.69
• Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected

6. 1.2.43
   • Install above version.
   • Enable Rewards, view an ad
   • Close. Rename profile to Nightly.
   • Launch 1.5.69
   • Ads panel displays as expected, AC is still on as expected, no error on wallet panel as expected