Jetpack Focus: Handle create page flow for phase four

[zwarm]

Parent #17339

This PR removes the first step in the page creation flow (template selection) when phase four is enabled.
Creating a page from scratch will still be supported.

To test:

• Download and install the WP app
• Login
• Navigate to the My Site tab
• Tap on the floating action button and select Site Page
• ✅ Verify that the Site Page flow is started and the template view is visible
• Navigate back out to My Site
• Navigate to the Pages list
• On the pages list, tap on the floating action button
• ✅ Verify that the Site page flow is started and the template view is visible
• Navigate to -> Debug Settings -> and Enable jp_removal_four and restart the app
• Navigate to the My Site tab
• Tap on the floating action button and select Site Page
• ✅ Verify that the create page view is visible and the template view is no longer visible
• Navigate back to My Site
• Navigate to the Pages list
• On the pages list, tap on the floating action button
• ✅ Verify that the create page view is visible and the template view is no longer visible

Regression Notes

1. Potential unintended areas of impact
   The create page flow still shows the template view

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Manual testing

3. What automated tests I added (or what prevented me from doing so)
   N/A

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 these changes on Jetpack by downloading jetpack-installable-build-pr17738-b2feee0.apk

	💡 Scan this QR code with your Android phone to download and install the APK directly on it.
	App	Jetpack
	Build Flavor	Jalapeno
	Build Type	Debug
	Commit	b2feee0

Note: This installable build uses the JalapenoDebug build flavor, and does not support Google Login.

[wpmobilebot]

📲 You can test these changes on WordPress by downloading wordpress-installable-build-pr17738-b2feee0.apk

	💡 Scan this QR code with your Android phone to download and install the APK directly on it.
	App	WordPress
	Build Flavor	Jalapeno
	Build Type	Debug
	Commit	b2feee0

Note: This installable build uses the JalapenoDebug build flavor, and does not support Google Login.

[AjeshRPai]

Everything LGTM 👍🏼