Fix incorrect date range on the traffic tab

[irfano]

Fixes #20334

This fixes showing incorrect date range on the bar chart on TRAFFIC tab.

StatsDateFormatter adds "23:59" as time while parsing the day. In a case like the site timezone is 0, device timezone is -1, it fetches one day later from the current day. Removing "23:59" and making the time "00:00" resolved the issue.

before	after

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To Test:

1. Log in JP.
2. Select a site that has timezone 0.
3. Change the device timezone to -1.
4. Open the Stats Traffic tab
5. Tap "By day" and change it to "By week"
6. Verify that the date range of the date picker is same with the one shown on the chart

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Regression Notes

1. Potential unintended areas of impact

   • None.

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)

   • The issue was caused by a logic from 3rd party lib (FluxC). It's not possible to add automated test in WPAndroid.

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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.

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Testing Checklist:

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• Talkback.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• Large and small screen sizes. (Tablet and smaller phones)
• Multi-tasking: Split screen and Pop-up view. (Android 10 or higher)

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 24.4. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

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[wpmobilebot]

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	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr20362-e280ec1
	Commit	e280ec1
	Direct Download	wordpress-prototype-build-pr20362-e280ec1.apk

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[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	pr20362-e280ec1
	Commit	e280ec1
	Direct Download	jetpack-prototype-build-pr20362-e280ec1.apk

Note: Google Login is not supported on these builds.

[aditi-bhatia]

LGTM, fixes the issue 👍

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 40.15%. Comparing base (6a24dff) to head (e280ec1).
Report is 11 commits behind head on trunk.

Files	Patch %	Lines
...h/lists/sections/traffic/TrafficOverviewUseCase.kt	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #20362      +/-   ##
==========================================
- Coverage   40.15%   40.15%   -0.01%     
==========================================
  Files        1476     1476              
  Lines       68270    68275       +5     
  Branches    11329    11329              
==========================================
  Hits        27417    27417              
- Misses      38344    38349       +5     
  Partials     2509     2509              

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