Support for Google Ads Mobile v8.0.0+

[acangiani]

Hi!

I had been trying to test a native ad unit and to generate a report for the Google Mobile Ads SDK Developers forum but I realized that the examples are not up to date with the latest changes.

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How to reproduce the issue

1. Git clone this repo
2. cd googleads-mobile-ios-examples/Objective-C/admanager/AdManagerCustomRenderingExample/ (the example I need)
3. Run pod update

> pod update
Update all pods
Updating local specs repositories
...
Installing Google-Mobile-Ads-SDK (8.1.0)
Installing GoogleAppMeasurement (7.6.0)
Installing GoogleUserMessagingPlatform (1.4.0)
Installing GoogleUtilities (7.2.2)
Installing PromisesObjC (1.2.12)
Installing nanopb (2.30907.0)
Generating Pods project
Integrating client project
Pod installation complete! There is 1 dependency from the Podfile and 6 total pods installed.

4. Open AdManagerCustomRenderingExample.xcworkspace
5. Run the project and get several errors related to outdated classes, types, etc:
   

for instance GADUnifiedNativeAd should be replaced by GADNativeAd. Is there any ETA for when the repo will be updated?

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Documentation links:

• Google ads v8 migration guide