[Android] Implement feature: Pinning/Unpinning notes

[Varsha-Kulkarni]

I've read and understood the contributing guidelines;
https://github.com/patilshreyas/NotyKT/blob/master/CONTRIBUTING.md

Summary

• Pin notes so that they will be added to priority spot, at the top for easy access, similar to Google Keep. (Closes [Android] Feature Request: Pin notes #534)

Description for the changelog

• When app is logged in, existing notes can be pinned by navigating to Note Detail screen of simpleapp and composeapp.
• When navigated to Note Detail screen, the note can be pinned by tapping on Pin (📌 ) option.
• Pinned notes are placed at the top of the list retaining sort order based on note creation date.
• pinned state is lost when synced with backend since Noty-api is not updated to support pinning yet.

A picture or screenshot regarding change

Checklist

• Build and linting is passing.
• This change is not breaking existing flow of a system.
• I have written test case for this change.
• This change is tested from all aspects.
• Implemented any new third-party library (Which not existed before this change).

[PatilShreyas]

@Varsha-Kulkarni Thanks for raising this awesome PR 😃. The change is really nice 👍🏻. I have a few comments, let's discuss them.

[Varsha-Kulkarni]

Thanks so much @PatilShreyas. I will make the reviewed/required changes and update PR.

[PatilShreyas]

@Varsha-Kulkarni CI is failing because the isVisible extension property is not imported in the class NotesListAdapter.

[PatilShreyas]

Everything Looks good to me 😃. Once CI is passed, would be happy to merge. Thanks for awesome PR 👍🏻.

[Varsha-Kulkarni]

Thanks to you for this opportunity to work on this awesome project:)