Recalculate auto-contribute table after exclude

[jasonrsadler]

Fixes brave/brave-browser#1410

Ledger implementation: brave-intl/bat-native-ledger#161

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
  • Windows
  • macOS
  • Linux
• Verified that these changes pass automated tests (npm test brave_unit_tests && npm test brave_browser_tests) on
  • Windows
  • macOS
  • Linux
• 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

Test Plan:

1. Start Brave and enable Rewards
2. Add some sites to auto-contribute
3. Exclude some sites and verify the percentages are recalculated correctly
4. Restore excluded publishers and verify the percentages are recalculated correctly

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

[NejcZdovc]

master 804ea39
0.57.x 5a0cff2
0.56.x 705d423
0.55.x 4b2788d

[bbondy]

Reverted for hotfix2, so will only be in 0.56.x and beyond.