Fix#2980: Educational in-product Notification

[soner-yuksel]

This PR is adding functionality to educational in-product notifications.

The added functionality can be states as follows.

Notification types will be shown

• First time blocking
• 20+ trackers & ads blocked on this page.
• HTTPS Upgrade triggered
• A Streaming site is loaded and ad is blocked

And also Brave Benchmark Tiers are added so every tier user will be shown a notification regarding to which level they are and sharing options for Issue #2981

Please refer to respected documents for details.

Summary of Changes

This pull request fixes #2980

Submitter Checklist:

• Unit Tests are updated to cover new or changed functionality
• User-facing strings use NSLocalizableString()

Test Plan:

• Load fresh installed Brave Browser
• Type www.google.com in address bar and check Type 1 - "Trackers & ads blocked on this page." pop-over is displayed.
• Press "Take a look" button and check Brave Shields pop-over is displayed.
• Load a URL from Vimeo (https://vimeo.com/search?q=test) and check Type 2 - "Ads are blocked while watching videos on this website" pop-over is displayed.
• Kill the application and start again. Type 2 - 3 - 4 (blue background) pop-overs can be shown only once per application session (repeat this every time you want to check a different type of notification pop-over.
• Load a URL from a website that has lots of tracker like (www.buzzfeed.com), check Type 3 - "10+ trackers & ads blocked on this page." pop-over is displayed.
• Repeat the previous step (Kill the application and start again)
• Load a URL from a website that triggers from a website that triggers https upgrade like (www.cnn.com or https://imagery.pragprog.com), check Type 4 - "Your connection is now encrypted." pop-over is displayed.

Screenshots:

Reviewer Checklist:

• Issues include necessary QA labels:
  • QA/(Yes|No)
  • release-notes/(include|exclude)
  • bug / enhancement
• Necessary security reviews have taken place.
• Adequate unit test coverage exists to prevent regressions.
• Adequate test plan exists for QA to validate (if applicable).
• Issue is assigned to a milestone (should happen at merge time).

[iccub]

Please look at both this review and the other PR, i did not notice they are based off each other

[iccub]

minor comments

[iccub]

99,9% ready last nitpicks left :)