Provide an option to remove Top Tiles from NTP

[anthonypkeane]

Description

This person makes a fair point here,

Let's provide an option to remove Top Tiles from NTP.

Settings details TBD @timchilds

[anthonypkeane]

Related to: #22921

[kjozwiak]

@brave/qa-team please see the STR/Cases that I created/went through via brave/brave-core#13519 (comment) when verifying via 1.40.x 👍

[kjozwiak]

The above will require 1.40.100 or higher for 1.40.x verification 👍

[Uni-verse]

Verification in progress using

Brave	1.40.101 Chromium: 103.0.5060.42 (Official Build) (32-bit) 
Revision	de0d840bf9439c31bd86bf74f065c31fdf9b208d-refs/branch-heads/5060@{#667}
OS	Android 12; Build/SP1A.210812.016

Referred to brave/brave-core#13519 (comment) as a basis for the test plan

Clean Profile:

• ensured that the Top Tiles being displayed under NTP on a clean install (you'll need to open a second tab due known issue)
• ensured that Show Top sites is enabled by default via Settings -> New Tab Page`
• ensured that the Top Tiles is displayed under the NTP after several restarts
• ensured that the Top Tiles are removed from NTP when disabled via Settings -> New Tab Page
• ensured that Top Tiles isn't visible after opening several NTP after being disabled
• ensured that Top Tiles isn't visible after restarting the browser several times after being disabled
• ensured there's no obvious issues when going between portrait & horizontal modes while Top Tiles are disabled
• ensured that Brave still remembers the most popular websites and still populates Top Tiles even though disabled
• Example: Disable Top Tiles, visit several websites and than re-enable (they should be appearing via the Top Tiles
• ensured that all the context menu's are working as expected after Disabling and than Enabling the Top Tiles
• Open in new tab in group, Open in Private tab, Open in other window, Download link, Remove
• ensured that Top Tiles are still visible/working when both Show Background Images & Sponsored Images are disabled
• ensured that two rows are being displayed when both Show Background Images & Sponsored Images are disabled
• ensured that Top Tiles can be disabled when both Show Background Images & Sponsored Images are disabled

Upgrade:

Case: Upgrade from app version that doesn't support feature

• downloaded/installed 1.39.120 Chromium: 102.0.5005.99
• ensured that Show Top sites is not visible/available under Settings -> New Tab Page
• Upgraded to 1.40.101 Chromium: 103.0.5060.42
• ensured that Top Tiles are still visible under NTP
• ensured that Show Top sites is enabled via Settings -> New Tab Page

Known related issues: #23474

Example	Example	Example	Example	Example

[Uni-verse]

@Uni-verse Check below case when next release build is available.

Case:

• downloaded/installed 1.40.x build with feature
• disabled Show Top sites from Settings -> New Tab Page and restarted re-launched the browser as specified
• Upgraded 1.40.x app
• ensured that Top Top tiles are not being displayed under NTP
• ensured that Show Top sites is disabled via Settings -> New Tab Page