Using an emulator to test your Android builds can really speed up your development. Unity can build the app automatically and push it to your preferred emulator. Testing your product with powerful hardware can be a key in production. There are several emulators out in the wild and I’ll review some of them.
TL;DR: Open Android SDK Manager and install “Extras/Android Support Repository”.
After importing the unitypackage from play-games-plugin-for-unity, the project throws an error and stopped working. The error was not helpful at all, but the warning “Unable to find dependency com.android.support:support” indicates that the “Android Support Repository” is missing. Even if the support repository is not installed, the folder “$SDK/extras/android/m2repository” is present.