[iOS] [Android] Update NTP Brave Stats to 'Trackers & Ads Blocked'

[karenkliu]

Description:

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

Steps to Reproduce

1. Open a new tab

Actual result:

Expected result:

Reproduces how often: [Easily reproduced, Intermittent Issue]
Easily

Brave Version:
all versions

Device details:
n/a

Miscellaneous

This update is expected on all platforms.
Android brave/brave-browser#9693
Desktop brave/brave-browser#9692

[anthonypkeane]

Why not

Trackers & Ads Blocked @karenkliu

[karenkliu]

@anthonypkeane We are moving towards Sentence case everywhere (labels, button text, titles, etc.) except for things that are already Proper Nouns. So all three of the Brave Stats numbers should use sentence case because none of them contain proper nouns.

[anthonypkeane]

That is not consistent with iOS

[karenkliu]

Apple tends to use Title Case for everything, including menu items, but the NTP is our own UI. I don't think we need to conform our capitalization in our own UI to their system text. But LMK your final call on this and I'll update the screens for this issue.

[kylehickinson]

Going to close this in favour of #2932 which includes some other copy changes