Add switch to QA Preferences to enable vlog on Android

[AlexeyBarabash]

Add switch to QA Preferences to enable vlog messages for rewards and ads for QA team

Resolves brave/brave-browser#11088

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:

1. Connect phone with USB cable to computer, launch Android Device Monitor or Android Studio, enable filtering for Brave browser
2. Install apk
3. Go to kebab => Settings => Developer options => QA Preferences
4. Enable vlog for rewards should be in position off
5. Switch it to position on, restart when prompted
6. Find these messages in log

[VERBOSE1:ads_service_impl.cc(1308)] Migrating ads preferences
[VERBOSE2:ads_service_impl.cc(1334)] Ads preferences are up to date on version 7

7. Go to kebab => Settings => Developer options => QA Preferences
8. Switch Enable vlog for rewards to position off, restart
9. You should not find messages from pt6 in log

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.

[AlexeyBarabash]

Updated command line option after talk with @tmancey and @NejcZdovc

Skip all CI except Android, as all CI has been succeeded.

[AlexeyBarabash]

Fixed lint error

[AlexeyBarabash]

CI succeeded, but I have still cannot verify these option actually makes the vlog output expected, can't be merged yet.

[AlexeyBarabash]

CI failed on Windows for s3-upload phase

13:13:48  powershell.exe : upload failed: .\ to s3://****/brave-browser-build-pr/android_vlog_rewards/\ufffd\ufffde [Errno 2] No such file or directory: 
13:13:48  'C:\\ards\\src\\out\\Release\\'
13:13:48  At C:\ards@tmp\durable-fca1ffef\powershellWrapper.ps1:3 char:1
13:13:48  + & powershell -NoProfile -NonInteractive -ExecutionPolicy Bypass -Comm ...
13:13:48  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
13:13:48      + CategoryInfo          : NotSpecified: (upload failed: ...out\\Release\\':String) [], RemoteException
13:13:48      + FullyQualifiedErrorId : NativeCommandError
13:13:48   
13:13:48  upload failed: .\ to s3://****/brave-browser-build-pr/android_vlog_rewards/\ufffd\ufffde [Errno 2] No such file or directory: 'C:\\ards\\src\\out\\Release\\'
13:13:48  
13:13:49  upload failed: dist\ to s3://****/brave-browser-build-pr/android_vlog_rewards/\ufffd\ufffde [Errno 2] No such file or directory: 'C:\\ards\\src\\out\\Release\\dist\\'
13:13:49  

[SergeyZhukovsky]

++

[deeppandya]

LGTM

[AlexeyBarabash]

Converted to draft because received request and explanation from @bridiver how to redo this without patches

[AlexeyBarabash]

Looks good to me @SergeyZhukovsky

[tmancey]

LGTM

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.15.2 x64 nightly build

• Verified enabling vlog option from QA preferences logs rewards output in Android studio
• Verified disabling vlog option from QA preferences doesn't show any logs output in Android Studio