Fixed transparent colors in interpolateColors (software-mansion#2354)

## Description
When one of the colors in the output range was transparent, interpolateColors doesn't work, due to a wrong undefined check.

Fixes software-mansion#2328 

## Changes
- Changed to explicit check if color is undefined, to prevent issue when color value is 0

src/reanimated2/Colors.ts

@@ -707,7 +707,8 @@ const getInterpolateCacheRGBA = (
   for (let i = 0; i < colors.length; ++i) {
     const color = colors[i];
     const proocessedColor = processColor(color);
-    if (proocessedColor) {
+    // explicit check in case if processedColor is 0
+    if (proocessedColor !== null && proocessedColor !== undefined) {
       r.push(red(proocessedColor));
       g.push(green(proocessedColor));
       b.push(blue(proocessedColor));