Update calling-hero-sample.md

Author: iaulakh

articles/communication-services/samples/calling-hero-sample.md

@@ -23,3 +23,7 @@ zone_pivot_groups: acs-web-ios-android
 ::: zone pivot="platform-ios"
 [!INCLUDE [iOS Calling Hero Sample](./includes/ios-calling-hero.md)]
 ::: zone-end
+
+::: zone pivot="platform-android"
+[!INCLUDE [Android Calling Hero Sample](./includes/android-calling-hero.md)]
+::: zone-end