Fix scrolling with keyboard after viewing the PDF

[abzokhattab]

Details

Enabling the user to scroll with the down key using the keyboard after viewing the pdf

Related Issues

Expensify/App#34816 (comment)

Manual Tests

1. Upload a PDF
2. Open it
3. Press the "down arrow" keyboard button
4. verify that the scroll is working.

Linked PRs

Screenshots:

Screen.Recording.2024-03-23.at.8.52.22.PM.mov

Screen.Recording.2024-03-23.at.8.55.16.PM.mov

[hungvu193]

Reviewing shortly

[hungvu193]

Reviewer Checklist

• I have verified the author checklist is complete (all boxes are checked off).
• I verified the correct issue is linked in the ### Fixed Issues section above
• I verified testing steps are clear and they cover the changes made in this PR
  • I verified the steps for local testing are in the Tests section
  • I verified the steps for Staging and/or Production testing are in the QA steps section
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  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
• I checked that screenshots or videos are included for tests on all platforms
• I included screenshots or videos for tests on all platforms
• I verified tests pass on all platforms & I tested again on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
  • MacOS: Desktop
• If there are any errors in the console that are unrelated to this PR, I either fixed them (preferred) or linked to where I reported them in Slack
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• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
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• If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
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Screenshots/Videos

Android: Native

N/A

Android: mWeb Chrome

N/A

iOS: Native

N/A

iOS: mWeb Safari

N/A

MacOS: Chrome / Safari

Screen.Recording.2024-04-03.at.16.15.08.mov

MacOS: Desktop

Screen.Recording.2024-04-03.at.16.19.03.mov

[hungvu193]

LGTM!

[hungvu193]

All yours @flodnv

[flodnv]

Thanks!