Since version 17.0 play-services-ads requires specifying AD_MANAGER_APP=true in AndroidManifest.xml, so add this in the IMA extension's manifest. See also https://developers.google.com/ad-manager/mobile-ads-sdk/android/quick-start. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=222087771
