Remove Rewards JP-related restrictions for Android

[zenparsing]

Resolves brave/brave-browser#15786 & brave/brave-browser#15512

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

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, 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-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

This change only affects Android.

With this change, all rewards blocks related to the BAP transition for Android JP users should be removed. Specifically:

• Users should be able to fetch and claim promotions.
• Users should be able to see their BAT balance.
• Users should be able to tip.
• Users should be able to set monthly contributions.
• Users should be able to AC.

Additionally:

• "BAP" and "points" strings should no longer appear. The user should see "BAT" and "tokens" instead.
• The "verify wallet" button should not appear, and it should not be possible for the user to connect their wallet to any external wallet service provider.

[emerick]

LGTM

[zenparsing]

CI

• post-init failed on audit-deps (unrelated)
• linux failed on BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest (unrelated)

[deeppandya]

LGTM

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.26.21 x64 Nightly build

Verified test plan from PR

• Verified grants is shown for JP locale
• Verified able to claim grants
• Verified wallet updates with UGP grant
• Verified no mention of BAP Tokens or BAP on rewards panel/onboarding/rewards page/rewards internals page
• Verified able to perform an one-time tip
• Verified able to set a recurring tip
• Verified able to perform a contribution
• Verified no entry for Verify wallet on BR Panel

Logs

2021-05-18 01:10:49.350 21341-21341/? V/chromium: [VERBOSE5:ledger_impl.cc(145)] 
    [ REQUEST ]
    > URL: https://grant.rewards.bravesoftware.com/v2/attestations/safetynet
    > Method: POST
    > Content: {"paymentIds":["3ecd111e-b091-440d-9c40-aa6043dd08b1"]}
    > Content Type: application/json; charset=utf-8
2021-05-18 01:10:50.349 21341-21341/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v2/attestations/safetynet
    > Result: Success
    > HTTP Code: 200
    > Body: {"nonce":"bd331916-64f6-41cd-864e-b0054a119e5c"}
2021-05-18 01:10:52.148 21341-21341/? V/chromium: [VERBOSE5:ledger_impl.cc(145)] 
    [ REQUEST ]
    > URL: https://grant.rewards.bravesoftware.com/v2/attestations/safetynet/bd331916-64f6-41cd-864e-b0054a119e5c
    > Method: PUT
    > Content: {"token":"
2021-05-18 01:10:52.499 21341-21341/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v2/attestations/safetynet/bd331916-64f6-41cd-864e-b0054a119e5c
    > Result: Success
    > HTTP Code: 200
    > Body: 
2021-05-18 01:10:52.528 21341-21341/? V/chromium: [VERBOSE1:database_creds_batch.cc(131)] Record size is not correct: 0
2021-05-18 01:10:52.615 21341-21341/? V/chromium: [VERBOSE5:ledger_impl.cc(145)] 
    [ REQUEST ]
    > URL: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828
    > Method: POST
    > Content: {
2021-05-18 01:10:53.620 21341-21341/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828
    > Result: Success
    > HTTP Code: 200
    > Body: {"claimId":"72fa930c-b24a-4e8d-9025-92d4e88cf3bc"}
2021-05-18 01:10:53.645 21341-21341/? V/chromium: [VERBOSE5:ledger_impl.cc(145)] 
    [ REQUEST ]
    > URL: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828/claims/72fa930c-b24a-4e8d-9025-92d4e88cf3bc
    > Method: GET
2021-05-18 01:10:53.907 21341-21341/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828/claims/72fa930c-b24a-4e8d-9025-92d4e88cf3bc
    > Result: Success
    > HTTP Code: 202
    > Body: {"message":"Claim has been accepted but is not ready","code":202,"data":{}}
2021-05-18 01:10:53.911 21341-21341/? V/chromium: [VERBOSE1:promotion.cc(452)] Promotion completed with result LEDGER_OK
2021-05-18 01:10:58.914 21341-21341/? V/chromium: [VERBOSE5:ledger_impl.cc(145)] 
    [ REQUEST ]
    > URL: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828/claims/72fa930c-b24a-4e8d-9025-92d4e88cf3bc
    > Method: GET
2021-05-18 01:10:59.255 21341-21341/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v1/promotions/962abffd-4952-40cd-b90d-05868e233828/claims/72fa930c-b24a-4e8d-9025-92d4e88cf3bc
    > Result: Success
    > HTTP Code: 200
    > Body: {2021-06-17 01:20:59.381 27086-27086/? V/chromium: [VERBOSE6:logging_util.cc(136)] 
    [ RESPONSE - OnRequest ]
    > Url: https://grant.rewards.bravesoftware.com/v1/promotions?migrate=true&paymentId=3ecd111e-b091-440d-9c40-aa6043dd08b1&platform=android
    > Result: Success
    > HTTP Code: 200
    > Body: {"promotions":[]}

[kjozwiak]

Added brave/brave-browser#15512 to the resolved list as this was a release/blocker and opened within the milestone.