Unity Ads Levelplay

Integrate LevelPlay ad mediation into a Unity game through the Ads Mediation package (`com.unity.services.levelplay`): rewarded, interstitial and banner units for the SDK version that resolved. Load for "add ads to my game", "implement rewarded ads", "set up mediation", every LevelPlay symbol reporting CS0246, an Android or iOS build that fails on ad dependencies after a clean Editor compile, no ads when you press Play, GDPR/CCPA/COPPA or iOS ATT wiring for ads, ad revenue that never reaches analytics, migrating off IronSource.Agent or Unity Ads, or an Android build that suddenly cannot resolve `com.ironsource.sdk`. Store declarations and manifest permissions are `unity-m…