My Question or Issue
Where can i find a detailed list of Android Release Notes / Updates / Updates Description / Update Log / Update Details / Update Notes / Product News?

In the Android Play Store they have a section for each app called "What's New" where developers are supposed to describe the changes for each update. For years now, Spotify has pinned this lazy message in that section:
"We’re always making changes and improvements to Spotify. To make sure you don’t miss a thing, just keep your Updates turned on."

It's important to know what features are being added or removed with each update, that way users can make better use of the app. It's also just simply common courtesy to not hide that kind of information from your users.