Transition styles cause error in Android

[psavage]

Describe the bug
In the latest master version 18fc03c, setting a Transition style for a style property causes an error in Android (iOS works properly):

com.facebook.react.bridge.ReadableNativeArray cannot be cast to com.facebook.react.bridge.ReadableNativeMap
getMap
    ReadableNativeArray.java:153
getMap
    ReadableNativeArray.java:22
<init>
    RCTMGLStyleValue.java:46
getStyleValueForKey
    RCTMGLStyle.java:59
setRasterLayerStyle
    RCTMGLStyleFactory.java:526
addStyles
    RCTMGLRasterLayer.java:25
...

To Reproduce
Set the transition style for any transitionable style property e.g. set rasterOpacityTransition for rasterOpacity:

<Mapbox.RasterLayer
  id="myLayer"
  sourceID="mySourceId"
  style={{
    rasterOpacity: 0.7,
    rasterOpacityTransition: {
      duration: 0,
      delay: 0,
    },
  }}
/>

Expected behavior
Transition style should be set in Android without causing an error.

Versions

• Platform: Android
• Device: Emulator
• OS: Android 9
• SDK Version: 28
• React Native Version: 0.58.6

Additional context
https://github.com/react-native-mapbox/maps/blob/f0b469d75c2af3c2ffe44cdba47ff9abafd1d022/android/rctmgl/src/main/java/com/mapbox/rctmgl/components/styles/RCTMGLStyleValue.java#L45-L51 does not properly handle style values that are objects (transition style values are objects so array contains another array, not a map).

https://github.com/react-native-mapbox/maps/blob/f0b469d75c2af3c2ffe44cdba47ff9abafd1d022/android/rctmgl/src/main/java/com/mapbox/rctmgl/components/styles/RCTMGLStyleValue.java#L139-L140 does not get the transition options properly from the style value.