Android: Add Scroll bar view

[shuvashish76]

Currently we've only a viewbar for articles which lets you know where the current screen is in relation to the maximum height.
Adding a scroll button would allow users to jump screen quickly.

Feature request to add it for Main page, Feeds page and article Reading Page.
Have a look on this fastscroll library.

[shuvashish76]

https://github.com/nanihadesuka/LazyColumnScrollbar
Android Jetpack Compose LazyColumn scrollbar implementation

Also see: https://github.com/reddit/IndicatorFastScroll popular library by reddit but looks abandoned