fix(android): crash on null rippleColor

Author: farfromrefug

src/button/button.android.ts

@@ -86,8 +86,9 @@ export class Button extends ButtonBase {
     //     nativeView.setOnClickListener(clickListener);
     //     (<any>nativeView).clickListener = clickListener;
     // }
-    [rippleColorProperty.setNative](color: Color) {
-        this.nativeViewProtected.setRippleColor(getColorStateList(color.android));
+    [rippleColorProperty.setNative](value: Color) {
+        const color = !value || value instanceof Color ? value : new Color(value);
+        this.nativeViewProtected.setRippleColor(color ? getColorStateList(color.android) : null);
     }
     [shapeProperty.setNative](shape: string) {
         const appearanceModel = themer.getShape(shape);

src/core/index.android.ts

@@ -170,7 +170,7 @@ export function install() {}
 
 export function getRippleColor(color: string | Color) {
     if (color) {
-        const temp = typeof color === 'string' ? new Color(color) : color;
+        const temp = color instanceof Color ? color : new Color(color);
         return new Color(temp.a !== 255 ? temp.a : 61.5, temp.r, temp.g, temp.b).android; // default alpha is 0.24
     }
     return null;

src/core/index.ios.ts

@@ -194,7 +194,7 @@ export function install() {}
 
 export function getRippleColor(color: string | Color): UIColor {
     if (color) {
-        const temp = typeof color === 'string' ? new Color(color) : color;
+        const temp = color instanceof Color ? color : new Color(color);
         // return UIColor.colorWithRedGreenBlueAlpha(temp.r / 255, temp.g / 255, temp.b, temp.a !== 255 ? temp.a / 255 : 0.14);
         return new Color(temp.a !== 255 ? temp.a : 61.5, temp.r, temp.g, temp.b).ios; // default alpha is 0.24
     }