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How is Compose detecting that a new render needs to be done?
For example, when a state changes, but doesn't lead to changes in the tree. Which APIs let Compose UI for Android know that it needs to ask the system to redraw (calling invalidate)?

Usually state updates, most modifiers use `observerReads` to track layout/draw changes

What is `observerReads`? Where does it come from?

Digging deep, I found about the `SnapshotStateObserver` class, which has an `observeReads` function that executes a block and calls a callback when one of the states read inside said block was changed.

draw is invalidated based on:
1. state reads inside draw* modifiers
2. changes in composition/layout phases
3. Modifier.Node invalidate calls
Maybe I forgot something, but i think those are the main paths