[Android] reorganises Settings and Privacy settings, sets shields global prefs

[alexsafe]

Resolves brave/brave-browser#7487

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:

Please check the latest figma file included in the issue for the UI/UX changes:

• all settings found in figma should appear in the exact order in the app
• all icons should correspond to the right setting
• any other inconsistencies

Probably all (or most) settings will need to be re-checked just to be sure.
Please look for any missing settings or things that might not make sense.

The way the settings bellow work has been changed :

Search engines

• opens a new preference screen where you can choose the default search engine for private and standard tabs
• the behaviour after choosing should be as before and reflect in the app's behaviour

Testing for the new Brave shields & privacy settings -> shields global defaults:

• Block ads & trackers - set to aggressive

1. On duckduckgo search for something like "samsung galaxy s10"
2. Check the result of the search:

• there should be no hits that contain Ads
• Block ads & trackers - set to standard or allow

1. Open a new tab and repeat the steps above. The result should contain a few Ads hits in the beginning of the result list

-Block cookies

• block all cookies:
  • Open a new tab and try to log on facebook. you shouldn't be able log in
• block cross-site cookies and allow should allow you to login

-Fingerprinting -test plan to be determined

• Block scripts -on should show a blank page on Facebook

Testing for Brave shields & privacy settings -> Clear browsing data - Clear data on exit

1.When it's on, after the app is closed (swiped out) re-opening it should result in the following data to be wiped (it wipes it for the whole history):

• browsing history
• cookies
• passwords
• forms
• site settings
• cache
  It does not closes open tabs (for that there is the separate close all tabs on exit setting that can be used in combination)

Testing for Brave shields & privacy settings -> Other - WebRTC

• After entering the preference screen for WebRTC there should be a Learn More link that should go to https://support.brave.com/hc/en-us/articles/360017989132-How-do-I-change-my-Privacy-Settings-#webrtc
• The browser functions and behaviour should be the same

[samartnik]

I thought we decided to check if it false here instead of this clause.

[samartnik]

lgtm

[AlexeyBarabash]

++