news scroll velocity stops when scrolling down at the start of the feed - follow up to #21475

[kjozwiak]

Test plan

See brave/brave-core#13951

Description

So now that #21475 has been fixed, the experience in scrolling has drastically improved. However, the issue still exists when you start scrolling starting at the top of the Brave News feed. As @bsclifton mentioned, when you start scrolling, the velocity basically stops dead in its tracks unless you swipe a second time and then continue going through the feed. Before, you needed to swipe through the

It's working as expected when scrolling from the bottom to the top but as mentioned above, it still runs into the same issue when you start at the top of the feed.

Steps to reproduce

1. launch Brave and enable the Brave News feed
2. once enabled, start swiping through the news feed and you'll notice that the velocity will stop
3. swipe a second time to keep scrolling through the news feed

Actual result

screen-20220420-142002.mp4

Expected result

When scrolling, the velocity should stay the same and keep going/not stop in the middle of the feed.

Issue reproduces how often

100% reproducible using the STR mentioned above

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version? Yes
• Can you reproduce this issue with the current Play Store Beta version? Yes
• Can you reproduce this issue with the current Play Store Nightly version? Yes

Device details

• Install type (ARM, x86): ARM
• Device type (Phone, Tablet, Phablet): Pixel 6 (Phone)
• Android version: Android 12

Brave version

• 1.39.73 Chromium: 101.0.4951.34

Website problems only

• 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

Additional information

CCing @timchilds @mattmcalister @anthonypkeane @srirambv @Uni-verse @alekseva @deeppandya

[Uni-verse]

Verified on Samsung GS 21 & Samsung Galaxy Tab S7 running Android 12 using

Brave	1.43.74 Chromium: 104.0.5112.102 (Official Build) beta (64-bit) 
Revision	8e5396254975ef939f2ef7d0bd334e48a052b536-refs/branch-heads/5112@{#1478}
OS	Android 12; Build/SP1A.210812.016

• Verified scrolling velocity doesn't stop in the middle of the feed.
• Verified scrolling velocity is consistent in portrait and landscape orientation.
• Verified scrolling is consistent with background images disabled from the New Tab Page settings menu

Mobile	Tablet
22434_fix.mp4	22434_tablet_fix.mp4