Interface
Android
```kotlin
interface SurfaceScope
```
`SurfaceScope` is a scoped environment provided by `AndroidExternalSurface` and
`AndroidEmbeddedExternalSurface` to handle `Surface` lifecycle events.
## Functions
onChanged
```kotlin
fun Surface.onChanged(onChanged: Surface.(width: Int, height: Int) -> Unit)
```
Invokes `onChanged` when the surface's geometry (width and height) changes. Always invoked on
the main thread.
onDestroyed
```kotlin
fun Surface.onDestroyed(onDestroyed: Surface.() -> Unit)
```
Invokes `onDestroyed` when the surface is destroyed. All rendering into the surface should
stop immediately after `onDestroyed` is invoked. Always invoked on the main thread.