Issue/13268 introduce date range picker screen in Activity Log

[malinajirka]

Partially fixes #13268

Merge instructions:

1. Review this PR
2. Make sure Introduce activity log filters feature flag #13270 is merged
3. Remove "Not ready for merge" label
4. Merge this PR

This PR introduces Material Fullscreen Date Range picker component in Activity Log. It overrides some styles of the material component to facilitate future styling. The design of the date range picker hasn't been finalised yet so ignore the overall styling for now.

Unit tests will be added in a separate PR.

To test:

1. My Site -> Avatar icon in the toolbar -> App Settings -> Test feature configuration
2. Enable ActivityLogFiltersFeatureConfig and click on "Restart app"
3. Open Activity Log
4. Click on the "Date range" chip
5. Notice the fullscreen date range picker is shown
6. Select a date range
7. Click on "Cancel"
8. Click on the "Date range" chip and notice no date range is pre-selected
9. Select a date range
10. Click on "Save"
11. Click on the "Date range" chip and notice the date range from step 9 is pre-selected

PR submission checklist:

• I have considered adding unit tests where possible.
• 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 optional UI/connected tests for these changes by visiting CircleCI here.

[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading the APK here.

[ParaskP7]

Cool stuff, now we have a material picker that we can play with! 🌟

PS: I didn't use emoji this time, but I did use a suffix on each of my comments to give you some context of what to expect (like Minor: Xyx or Idea: Xyz). Let me know your thoughts.

[malinajirka]

Thanks for the review @ParaskP7!

PS: I didn't use emoji this time, but I did use a suffix on each of my comments to give you some context of what to expect (like Minor: Xyx or Idea: Xyz). Let me know your thoughts.

I like it. We actually already use "NitPick:" prefix on minor comments - eg. this comment.

[ashiagr]

Material date range picker looks great! Good job 👍.
Just noticed one issue when the last selected date range was not pre-selected the next time.

Steps to reproduce:

• Open the date picker
• Change orientation
• Select a date range
• Click save
• Reopen the date picker
• Notice that the last selected date range is not pre-selected

[malinajirka]

Nice catch @ashiagr! Thanks for the review ;)

Fixed in 29b9c17 and b7c44fe.

[ashiagr]

LGTM 👍. I've tested and confirm that last selected data range is saved properly after save action is performed after orientation change.