Remove Yandex ads and Integrate appodeal ads

I already have a complete Flutter application and now want to monetise it with Appodeal. Your task is simple yet critical: wire the latest Appodeal SDK into the existing code-base, Yandex ads already embedded in source code you have to remove replace it with appodeal ads.

What I expect from you
• Add the Appodeal SDK and all required Gradle / Podfile changes without breaking current dependencies.
• Initialise the SDK with my App Key and enable only the Rewarded Video ad type.
• Expose a clean Dart method (e.g. showRewardedAd()) so I can trigger the ad from any screen.
• Handle callbacks for loaded, failed, shown, clicked and reward-granted events; deliver the reward result back to Dart.
• Supply a short README that explains every step you took, any new permissions, pro-guard rules, and how to reproduce the build.
• Provide a brief demonstration video or TestFlight / APK proving the rewarded ad shows and grants the reward.

Acceptance will be based on:
1. No runtime crashes or build warnings related to the SDK.
2. Reward callback fires 100 % of the time after the ad finishes.
3. Android (API 33+) verified.

If you have previous experience integrating Appodeal or other mediation layers in Flutter, this should be straightforward and quick. Let’s get this done so I can focus on growing the app!