Fix Fit.LAYOUT artboard oversized on Android

Set layoutScaleFactorAutomatic to device density at init time. Defaults
to 1.0 and onMeasure may not fire before the render thread uses it.

Fixes #206

Author: mfazekas

android/src/main/java/com/rive/RiveReactNativeView.kt

@@ -81,6 +81,8 @@ class RiveReactNativeView(context: ThemedReactContext) : FrameLayout(context) {
 
   init {
     riveAnimationView = ReactNativeRiveAnimationView(context)
+    // https://github.com/rive-app/rive-nitro-react-native/pull/209
+    riveAnimationView.layoutScaleFactorAutomatic = resources.displayMetrics.density
     addView(riveAnimationView)
   }