fix undefined colors on litho components

Summary:
When a color was changed on a litho component, the changes were made, but the display in Flipper's layout sidebar always showed `rgba(0,0,0,0)` as a color. This was because reading the color failed for `ComparableColorDrawable` and it sent `0` as fallback value.

This diff adds an additional check if the value is an instance of `ComparableColorDrawable` and reads the color from it.

Reviewed By: passy

Differential Revision: D15469093

fbshipit-source-id: 7f1aaf1c4981815605aca5ba735fa09e80deaa42

src/ui/components/data-inspector/DataDescription.js

@@ -447,7 +447,9 @@ class DataDescriptionContainer extends Component<{
 
       case 'color': {
         const colorInfo = parseColor(val);
-        if (colorInfo) {
+        if (typeof val === 'number' && val === 0) {
+          return <UndefinedValue>(not set)</UndefinedValue>;
+        } else if (colorInfo) {
           const {a, b, g, r} = colorInfo;
           return [
             <ColorBox key="color-box" color={`rgba(${r}, ${g}, ${b}, ${a})`} />,