Internal updates (#1563)

Author: nakirekommula

gma/src/ios/FADNativeDelegate.h

@@ -32,7 +32,7 @@ class NativeAdInternalIOS;
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface FADNativeDelegate : NSObject <GADNativeAdLoaderDelegate, GADAdLoaderDelegate>
+@interface FADNativeDelegate : NSObject <GADNativeAdLoaderDelegate, GADAdLoaderDelegate, GADNativeAdDelegate>
 
 /// Returns a FADNativeDelegate object with NativeAdInternalIOS.
 - (FADNativeDelegate *)initWithInternalNativeAd:

gma/src/ios/native_ad_internal_ios.mm

@@ -220,6 +220,7 @@
 
 void NativeAdInternalIOS::NativeAdDidReceiveAd(GADNativeAd *ad) {
   firebase::MutexLock lock(mutex_);
+  ad.delegate = native_ad_delegate_;
   native_ad_ = ad;
 
   NSObject *gad_icon = ad.icon;