fix(angular2-cookie-law.service): Set banner initial state to hidden

When transferring state from SSR to browser users who have seen the notice would be flashed briefly
with the notice before browser hides it based on the cookie.

projects/angular2-cookie-law/src/lib/angular2-cookie-law.service.ts

@@ -23,11 +23,11 @@ export class Angular2CookieLawService {
 
     if (isPlatformBrowser(this.platform)) {
       cookies = this.doc.cookie.split(';');
-    } else {
-      return true;
+
+      return this.cookieExisits(cookieName, cookies);
     }
 
-    return this.cookieExisits(cookieName, cookies);
+    return true;
   }
 
   public storeCookie(cookieName: string, expiration?: number): void {