Android (Admob Plugin + Google Play Game Plugin) doesn't work together

Hey everyone,

We are some people that try to get Admob (Ads) and Google Play Game Service (Leaderboard) to work together and we are getting a lot of errors...

How to reproduce:
1- Import GooglePlayGameService Package
2 - Import Admob Package
3 - Window -> Google Play Games -> Setup -> Android Setups...
4 - Configure with my google play infos
5 - Build on Android device
6 - Getting Re-package error see console for more detail

See Erreur.PNG to see the error we get while importing thoses...

Android (Admob Plugin + Google Play Game Plugin) doesn't work together