Empty stats: nudge presentation logic fixes

[nikola-milicevic]

Fixes #17371
FIxes #17376

Test first nudge shown again after all the nudges are dismissed

1. Do a fresh install of WPiOS
2. On My Site select a site with more than 30 views
3. Dismiss the Customize Insights card, then go back to My Site
4. On My Site select a site with less than 30 views
5. Go to Stats
6. Dismiss the first empty stats nudge, then go back to My Site
7. Go to Stats
8. Dismiss the second empty stats nudge, then go back to My Site
9. Go to Stats
10. Complete the Reader Discover nudge flow, then go back to My Site
11. Go to Stats
12. No nudge cards should be shown

Test dismissing the completed nudge card dismisses the next (not completed) nudge

1. Complete Publicize or Blogging reminders nudge on the My site > Stats screen
2. Completed nudge card is presented for that nudge (that has just been completed)
3. Tap Dismiss on that card
4. Go back to My site and back again to Stats screen
5. The next nudge should be presented

Regression Notes

1. Potential unintended areas of impact
   n/a

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

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 unit tests for my changes.
• 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.

[peril-wordpress-mobile]

You can trigger an installable build for these changes by visiting CircleCI here.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[leandroalonso]

I tried a few things to get rid of this but no luck. 😢

[nikola-milicevic]

Yup 😬