Brave News: show 15 sources in Suggestions list

[mattmcalister]

As noted by @LorenzoMinto the precision of the suggestions declines the further you scroll down. So, let's reduce the number presented to the user to 15 sources in total.

[kjozwiak]

@mattmcalister assuming this is referring to Brave News v2? If that's the case, then this is blocked on Android until we enable the feature via 1.50.x and then make a decision re: uplifting into 1.49.x. We're still waiting on @deeppandya to enable Brave News v2 on 1.50.x. If we decide to let it ride the trains via 1.50.x, this will be a QA/No for Android and the feature will get verified as a whole via 1.50.x.

[fallaciousreasoning]

This one was particularly for desktop I think - we were showing all the suggestions & now we limit it to 15. If we do the same on Android once the feature is enabled I think that should be fine.

[mattmcalister]

not a problem. it's a UX enhancement, happy for it to land whenever makes sense.

[stephendonner]

Verified PASSED using

Brave	1.49.97 Chromium: 110.0.5481.77 (Official Build) beta (x86_64)
Revision	65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS	macOS Version 11.7.3 (Build 20G1116)

Steps:

1. installed 1.49.97
2. launched Brave
3. opened a new-tab page
4. scrolled down
5. clicked on Show Brave News
6. followed a few sources
7. clicked on View All beside Suggestions

Confirmed we now cap the Suggestions list at 15 items, where we have over 3 pages worth, in 1.49.15

1.49.97	1.49.15	1.49.15, page 2	1.49.15, page 3

[Uni-verse]

Verified on Samsung GS 21 using version:

Brave	1.49.117 Chromium: 111.0.5563.50 (Official Build) (64-bit) 
Revision	39f3dfc5023fe60997adc4f6cf5439cfa3e6968a-refs/branch-heads/5563@{#903}
OS	Android 13; Build/TP1A.220624.014

Using Test Plan in brave/brave-core#16790 (comment)

Precondition: Brave News V2 enabled

• Ensured following some sources will create a suggestions list
• Ensured that the number of items in the suggestions is capped at 15

Example	Example