simplify the android beta/nighty lanes
simplify the android beta/nighty lanes

I realized that they were using much the same structure, so I added an
argument for specifying the "track" that the :beta lane will upload to.

That way, :nightly can just call :beta.

carls-app/carls,carls-app/carls,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,carls-app/carls,carls-app/carls,StoDevX/AAO-React-Native,carls-app/carls,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,carls-app/carls,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,carls-app/carls,StoDevX/AAO-React-Native