Autofill Settings - Import passwords via sync

[amddg44]

Task/Issue URL: https://app.asana.com/0/72649045549333/1206531758082871/f
Tech Design URL:
CC:

Description:
Gives users a path to import passwords via importing on desktop and enabling sync

Steps to test this PR:

1. Delete all saved passwords (if any) and disable Sync (if enabled)
2. Go to the Passwords screen and confirm the empty state of the screen contains the new "Import Passwords" button
3. Tap the "Import Passwords" button and confirm it segues to the new "Import Passwords" screen
4. Confirm the pixel m.autofill.logins.import.no.passwords fires
5. Back out of the screen and confirm the pixel m.autofill.logins.import.no-action is fired
6. Come back into the "Import Passwords" screen
7. Tap the "Get Desktop Browser" button and confirm it segues to the "Get DuckDuckGo for Mac or Windows" screen and that the pixel m.autofill.logins.import.get.desktop fires
8. Press the link button and confirm this url is copied to clipboard: https://duckduckgo.com/browser?origin=funnel_browser_ios_sync and that the pixel m.get.desktop.copy is fired
9. Tap the Share button and confirm the share sheet presents with the same url as before and that the pixel m.get.desktop.share is fired
10. Go back to the "Import Passwords" screen and this time tap the "Sync With Desktop" button
11. Confirm it segues to the Sync screen and that the pixel m.autofill.logins.import.sync fires
12. Go back the Passwords screen and add a password.
13. Tap the new more navigation bar button and select 'Edit' and confirm the Edit behaviour is as before
14. Tap the new more navigation bar button again and this time select "Import Passwords"
15. Confirm the screen segues correctly and that the pixel m.autofill.logins.import is fired
16. Relaunch the app and that no import success (or failure) pixel is fired
17. Sync the app with the desktop browser
18. Relaunch the app again and confirm that this time the pixel m.autofill.logins.import.success is fired

Copy Testing:

• Use of correct apostrophes in new copy, ie ’ rather than '

Orientation Testing:

• Portrait
• Landscape

Device Testing:

• iPhone SE (1st Gen)
• iPhone 8
• iPhone X
• iPhone 14 Pro
• iPad

OS Testing:

• iOS 14
• iOS 15
• iOS 16

Theme Testing:

• Light theme
• Dark theme

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Internal references:

Software Engineering Expectations
Technical Design Template

[github-actions]

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS against 24c43e3

[aataraxiaa]

Awesome work Anya! 🚀 Tested all functionality and Pixels.

Left a couple of super small suggestions. (The one about unnecessary return statements could apply to a few places in the code, but I didn’t comment at each as you may want to disregard the suggestion)