adIdFor method
Get the current platform ad ID for a type (null if not available)
Implementation
String? adIdFor(AdType type) => switch (type) {
AdType.banner => bannerIds?.current,
AdType.interstitial => interstitialIds?.current,
AdType.native => nativeIds?.current,
AdType.appOpen => appOpenIds?.current,
AdType.rewarded => rewardedIds?.current,
AdType.directInterstitial => directInterstitialIds?.current,
};