Set system color scheme for Android

## Feature Request

### Plugin
@capacitor/google-maps

### Description
Since the refactoring to the mapId, its not possible anymore to use custom map styles locally. Its possible to configure a light and dark theme in the google console, but the app does never reference the dark/night mode, but only the day/light mode. This happens, because the map config object does not set the color scheme.
```java
com.google.android.gms.maps.GoogleMapOptions.mapColorScheme(mapColorScheme: Int)
// Specifies a change to the initial map color scheme, default is MapColorScheme.LIGHT.
```
This should be set to MapColorScheme.FOLLOW_SYSTEM.

### Platform(s)
Android