[WP Individual JP Plugin] Show dialog with overlay

[thomashorta]

Part of #18114

Create a dialog for showing the Overlay screen. (only in the WordPress app)

The dialog is shown on top of the following screens:

• Site Picker
• Login Epilogue (site picker after login)
• Post Signup Interstitial (shown after first login ever - clear data - with no WP.com sites in the account)
• My site screen with empty state (after login with no WP.com sites in the account)

When the WP.com account has at least 1 "problem site", which fits the following conditions:

• self-hosted site
• has at least 1 Individual Jetpack plugin active and connected to the WP.com account
• does NOT have the full Jetpack plugin installed

To test:

Here are some of the test scenarios (WordPress app only).

Login - At least 1 WP.com site + at least 1 "problem site"

1. Log in to WordPress
2. verify the Login Epilogue (site picker) shows only WP.com sites
3. verify the overlay saying there are other sites with individual JP plugins is shown

Site Picker - At least 1 WP.com site + at least 1 "problem site"

1. After selecting one WP.com site
2. tap the Site selection arrow to open site picker
3. verify the site picker shows only WP.com sites
4. verify the overlay saying there are other sites with individual JP plugins is shown

Login - NO WP.com sites + at least 1 "problem site"

Important: this scenario only happens once, so to see it the app should be in a clear state by clearing the app data in the device settings.

1. Log in to WordPress
2. verify the Post Signup Interstitial is shown saying you have NO sites
3. verify the overlay saying there are sites with individual JP plugins is shown

My Site - NO WP.com sites + at least 1 "problem site"

1. After login, skip the Post Signup Interstitial
2. select the My Site tab (bottom navigation bar)
3. verify the overlay saying there are sites with individual JP plugins is shown

Notes

There are different overlay contents for each situation below. It would be good to test all combinations, but it can be complicated getting accounts in those specific situations:

1. Single "problem site" with a single JP Individual plugin
2. Single "problem site" with multiple JP individual plugins
3. Multiple "problem sites" some with single JP individual plugins and some with multiple plugins

Currently there is no logic to avoid showing the overlay repeatedly, which will be added in #18175.

Regression Notes

1. Potential unintended areas of impact
   Full-screen bottoms sheets behavior (ex: theme preview, blocs preview, jetpack feature overlay).

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)
   Added tests to all viewmodels showing the new overlay.

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 changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr18169-c84ebfc
	Commit	c84ebfc
	Direct Download	jetpack-prototype-build-pr18169-c84ebfc.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr18169-c84ebfc
	Commit	c84ebfc
	Direct Download	wordpress-prototype-build-pr18169-c84ebfc.apk

Note: Google Login is not supported on these builds.

[peril-wordpress-mobile]

	Warnings
⚠️	PR has more than 300 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS

[RenanLukas]

Thanks for the changes, @thomashorta . All the scenarios are working as expected 🎉

I've only left a few questions.

[RenanLukas]

LGTM