Support info window customization for advanced markers

[pmecho]

The APIs for customizing the info window are not exposed in the public API for advanced markers:

android-maps-compose/maps-compose/src/main/java/com/google/maps/android/compose/Marker.kt

Lines 832 to 833 in 6f4b188

	infoWindow: (@Composable (Marker) -> Unit)? = null,
	infoContent: (@Composable (Marker) -> Unit)? = null,

We need to be able to customize this so it would be good to expose via a public function.