Update NTP Brave Stats to 'Trackers & Ads Blocked' on desktop

[karenkliu]

Description

Update NTP Brave Stat text from 'Ads and Trackers Blocked' to 'Trackers & ads blocked'

Actual result:

Expected result:

Reproduces how often:

Easily

Brave version (brave://version info)

All builds

Version/Channel Information:

• Can you reproduce this issue with the current release? yes
• Can you reproduce this issue with the beta channel? yes
• Can you reproduce this issue with the dev channel? yes
• Can you reproduce this issue with the nightly channel? yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? n/a
• Does the issue resolve itself when disabling Brave Rewards? n/a
• Is the issue reproducible on the latest version of Chrome? n/a

Miscellaneous

This update is expected on all platforms.
iOS brave/brave-ios#2528
Android #9693

[rebron]

@0xedward Nice.

[GeetaSarvadnya]

Verification passed on

Brave | 1.10.86 Chromium: 83.0.4103.61 (Official Build) (64-bit)
-- | --
Revision | 94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS | Windows 10 OS Version 1803 (Build 17134.1006)

• Verified STR from the description
• Verified both clean and upgraded profile
• Trackers & ads blocked count is retained after browser restart
  
  

Verification PASSED on macOS 10.15.5 x64 Catalina using the following build:

Brave | 1.10.86 Chromium: 83.0.4103.61 (Official Build) (64-bit)
-- | --
Revision | 94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS | macOS Version 10.15.5 (Build 19F101)

• ensured that Ads and Trackers Blocked was renamed to Trackers & ads blocked under NTP
• ensured that stats under NTP are being updated when visiting websites
• ensured that restarting the browser doesn't reset the NTP stats
• ensured that disabling/enabling stats on NTP works without any issues
• ensured upgrading from 1.9.76 --> 1.10.86 didn't cause any issues

---

Verification passed on

Brave	1.10.86 Chromium: 83.0.4103.61 (Official Build) (64-bit)
Revision	94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS	Ubuntu 18.04 LTS

• ensured that Ads and Trackers Blocked was renamed to Trackers & ads blocked under NTP
• ensured that stats under NTP are being updated when visiting websites
• ensured that restarting the browser doesn't reset the NTP stats
• ensured that disabling/enabling stats on NTP works without any issues
• ensured upgrading from 1.9.76 --> 1.10.86 didn't cause any issues
• encountered [Desktop] NTP stats strings are not translated #9990

Polish