Jetpack Focus: Adjust screenshots for site topic

[zwarm]

Parent #16900

This PR adjusts the startNewSite to account for narrower displays.

To test:

1. Checkout the PR branch locally

2. Switch to jetpackJalapenoDebug build variant.

3. Launch an emulator or physical device that has a narrower display. I used a physical Pixel 5 device

4. Run the jPScreenshotTest from JPScreenshotTest in Android Studio to check that it succeeds.

   ⚠️ Note: When running multiple times you may get fails with Hilt or sometimes wiremock. We are starting an investigation into upgrading our wiremock library (we are really, really, really, far behind). Hopefully that will fix the wiremock issues.

   Emulator Setup Guide

   Ideally we run the tests on an emulator created by fastlane. See the notes in the issue for how this can be done:

   Follow the guide in SCREENSHOT_DEVICE_SETUP.md to create a device like the ones we're using for screenshots automation (this won't be super easy as the guide is a bit outdated and if you're on an M1 Mac you have to change the generated .ini files manually to set the arm64 architecture or else the emultators won't start.

5. Close emulator & wipe data

6. Switch to a device with a wider display and rerun from step 4

Regression Notes

1. Potential unintended areas of impact
   JP Screenshot tests no longer work

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Manually ran the JPScreenshotTest

3. What automated tests I added (or what prevented me from doing so)
   This is an automated test

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[wpmobilebot]

You can test the WordPress changes on this Pull Request by downloading an installable build (wordpress-installable-build-pr16967-31db036.apk), or scanning this QR code:

[wpmobilebot]

You can test the Jetpack changes on this Pull Request by downloading an installable build (jetpack-installable-build-pr16967-31db036.apk), or scanning this QR code:

[AjeshRPai]

I have looked at the code changes and tested the changes as per the instructions. Everything looks good to me. Great Job @zwarm . 👍 🙌