Fixes balance drop on android

[NejcZdovc]

Resolves brave/brave-browser#9992
Resolves brave/brave-browser#10471

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).
• Verified that these changes build without errors on
  • Android
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that these changes pass automated tests (unit, browser, security tests) on
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that all lint errors/warnings are resolved (npm run lint)
• Ran git rebase master (if needed).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed.
• 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-Protections
  • 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:

Plan 1:

1. start browser on master
2. enable rewards
3. claim grant
4. close browser
5. open DB and change:
   • type in promotion table from 0 to 1
   • empty unblinded_tokens table
6. start browser and make sure that balance is 0
7. close browser
8. switch to this PR
9. start browser
10. make sure that balance is showing correct again

Plan 2:

1. start browser on master
2. enable rewards
3. claim grant
4. make a tip
5. close browser
6. open DB and change:
   • type in promotion table from 0 to 1
   • empty unblinded_tokens table
7. start browser and make sure that balance is 0
8. close browser
9. switch to this PR
10. start browser
11. make sure that balance is still showing 0
12. open logs and make sure that you see this request and success response for it

[ REQUEST ]
> URL: https://grant.rewards.brave.software/v1/wallets/{paymentId}/events/batloss/1
> Method: UrlMethod::PUT
> Content: {"amount": 19.000000}
> Content Type: application/json; charset=utf-8

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.

[bsclifton]

Reviewed logic over Zoom; looks great! 😄

[bsclifton]

Verified logic on 1.10 (see #5940 (review))