i use SDK 21 and i develop on google map v2 when i want install apk on device , device need latest version of google play service.
My questions are:
1
You need to seperate the Google play services you use for developing your application and imbeding your Google Maps API V2 with the package installed on user's device.
Once you have understood it, you can use the latest package to develop you application. In case the users that is trying to install you application on his phone but he doesn't has the latest version, he would be promted to install the last version from Google Play Store if it support on his phone.