iOS: Relax constraints on FLTAdInstanceManager methods

For the `onBanner*` and `onNative*` methods, relax the type constraint
from `FLTBannerAd` and `FLTNativeAd` respectively, to `id<FLTAd>` so any
instance that conforms to `FLTAd` can be used.

Author: msbit

packages/google_mobile_ads/ios/Classes/FLTAdInstanceManager_Internal.h

@@ -39,21 +39,21 @@
 - (void)onAppEvent:(id<FLTAd> _Nonnull)ad
               name:(NSString *_Nullable)name
               data:(NSString *_Nullable)data;
-- (void)onNativeAdImpression:(FLTNativeAd *_Nonnull)ad;
-- (void)onNativeAdWillPresentScreen:(FLTNativeAd *_Nonnull)ad;
-- (void)onNativeAdDidDismissScreen:(FLTNativeAd *_Nonnull)ad;
-- (void)onNativeAdWillDismissScreen:(FLTNativeAd *_Nonnull)ad;
+- (void)onNativeAdImpression:(nonnull id<FLTAd>)ad;
+- (void)onNativeAdWillPresentScreen:(nonnull id<FLTAd>)ad;
+- (void)onNativeAdDidDismissScreen:(nonnull id<FLTAd>)ad;
+- (void)onNativeAdWillDismissScreen:(nonnull id<FLTAd>)ad;
 - (void)onRewardedAdUserEarnedReward:(FLTRewardedAd *_Nonnull)ad
                               reward:(FLTRewardItem *_Nonnull)reward;
 - (void)onRewardedInterstitialAdUserEarnedReward:
             (FLTRewardedInterstitialAd *_Nonnull)ad
                                           reward:
                                               (FLTRewardItem *_Nonnull)reward;
 - (void)onPaidEvent:(id<FLTAd> _Nonnull)ad value:(FLTAdValue *_Nonnull)value;
-- (void)onBannerImpression:(FLTBannerAd *_Nonnull)ad;
-- (void)onBannerWillDismissScreen:(FLTBannerAd *_Nonnull)ad;
-- (void)onBannerDidDismissScreen:(FLTBannerAd *_Nonnull)ad;
-- (void)onBannerWillPresentScreen:(FLTBannerAd *_Nonnull)ad;
+- (void)onBannerImpression:(nonnull id<FLTAd>)ad;
+- (void)onBannerWillDismissScreen:(nonnull id<FLTAd>)ad;
+- (void)onBannerDidDismissScreen:(nonnull id<FLTAd>)ad;
+- (void)onBannerWillPresentScreen:(nonnull id<FLTAd>)ad;
 
 - (void)adWillPresentFullScreenContent:(id<FLTAd> _Nonnull)ad;
 - (void)adDidDismissFullScreenContent:(id<FLTAd> _Nonnull)ad;

packages/google_mobile_ads/ios/Classes/FLTAdInstanceManager_Internal.m

@@ -110,19 +110,19 @@ - (void)onAppEvent:(id<FLTAd> _Nonnull)ad
                }];
 }
 
-- (void)onNativeAdImpression:(FLTNativeAd *_Nonnull)ad {
+- (void)onNativeAdImpression:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onNativeAdImpression" ad:ad];
 }
 
-- (void)onNativeAdWillPresentScreen:(FLTNativeAd *_Nonnull)ad {
+- (void)onNativeAdWillPresentScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onNativeAdWillPresentScreen" ad:ad];
 }
 
-- (void)onNativeAdDidDismissScreen:(FLTNativeAd *_Nonnull)ad {
+- (void)onNativeAdDidDismissScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onNativeAdDidDismissScreen" ad:ad];
 }
 
-- (void)onNativeAdWillDismissScreen:(FLTNativeAd *_Nonnull)ad {
+- (void)onNativeAdWillDismissScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onNativeAdWillDismissScreen" ad:ad];
 }
 
@@ -159,19 +159,19 @@ - (void)onPaidEvent:(id<FLTAd> _Nonnull)ad value:(FLTAdValue *_Nonnull)adValue {
                }];
 }
 
-- (void)onBannerImpression:(FLTBannerAd *_Nonnull)ad {
+- (void)onBannerImpression:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onBannerImpression" ad:ad];
 }
 
-- (void)onBannerWillDismissScreen:(FLTBannerAd *)ad {
+- (void)onBannerWillDismissScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onBannerWillDismissScreen" ad:ad];
 }
 
-- (void)onBannerDidDismissScreen:(FLTBannerAd *)ad {
+- (void)onBannerDidDismissScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onBannerDidDismissScreen" ad:ad];
 }
 
-- (void)onBannerWillPresentScreen:(FLTBannerAd *_Nonnull)ad {
+- (void)onBannerWillPresentScreen:(nonnull id<FLTAd>)ad {
   [self sendAdEvent:@"onBannerWillPresentScreen" ad:ad];
 }