Update Android Cookie Expiration date format to 24-hour format (HH)

[takuyaaaaaaahaaaaaa]

Summary

This PR modifies the method for formatting cookie expiration dates in the Android part of the flutter_inappwebview library. Specifically, it changes the time format from hh (12-hour format) to HH (24-hour format).

Changes

• Updated the getCookieExpirationDate method on Android to change the SimpleDateFormat pattern from "EEE, dd MMM yyyy hh:mm:ss z" to "EEE, dd MMM yyyy HH:mm:ss z".

Background

It was observed that cookies were correctly saved in the morning, but during late night hours, while iOS stored cookies normally, Android had issues with saving them. After investigation, it was determined that the use of the 12-hour format (hh) was the root cause of this behavior.

Connection with issue(s)

Resolve issue #1778

Connected to #1778

Testing and Review Notes

Please verify the following between 13:00 and 23:00 UTC:

1. Build the app on an Android device, launch the WebView, and check that cookies are set correctly.
2. Perform the same check on an iOS device (regression test).

The testing was done using the sample app, where cookies were retrieved and logged for verification. The sample app can be found here:
https://github.com/takuyaaaaaaahaaaaaa/FlutterWebViewSample

Screenshots or Videos

flutter-version:3.24.4
Android: Pixel8 API35 ※simulator
iOS: iPhone16Pro iOS18.1 ※simulator

Android

Before

After

iOS

Before

After

To Do

• double check the original issue to confirm it is fully satisfied
• add testing notes and screenshots in PR description to help guide reviewers
• request the "UX" team perform a design review (if/when applicable)

[pichillilorenzo]

Thanks! Didn't expect to miss this!

[pichillilorenzo]

@all-contributors please add @takuyaaaaaaahaaaaaa for code

[allcontributors]

@pichillilorenzo

I've put up a pull request to add @takuyaaaaaaahaaaaaa! 🎉