I have developed a mobile application that uses Google Maps Android API v1, and I plan to port it to the recent Google Maps Android API v2, as recommended by Google.
The Maps API are bundled with Google Play services and are compatible with Android 2.2 and higher. All devices with Android 8 API level support OpenGL 2.0, so devices with Android 2.1 version can't support Google Maps v2. You can check in the Google Documentation.