Google Play Services is getting several enhancements. Together with the Firebase for Android, this feature gets API level 14 at minimum. This Version 10.2.0 offers several benefits for the client libraries plus Firebase client libraries. Compared to the last version supporting Android API level 9 (Android 2.3 Gingerbread), this one increases the minimum API level to 14 which requires Android 4.0.1 Ice Cream Sandwich.
That will be the last one and sadly, Google announced that it will be ending support for the Honeycomb and Gingerbread in Google Play services. The reason for discontinuing the service is simple: they’re old. Some developers already stopped supporting the Android versions in their applications and services.
Ending support for older versions is expected. Doing so will help Google and developers to focus more on the latest services and features within the Android platform. There’s no point in rendering support for older versions if new apps and devices cannot handle them.
There shouldn’t be any problem with upgrading to 10.2.0 as long as API level 14 is supported. To update your app, get the latest API and Google Play services from the tech giant. Once ready and available, you are then free to use the API on your apps. With this update, you can also “build multiple APKs to support devices” as per Android Developers.
SOURCE: Android Developers Blog