Google will release new Google Play Services on next monday (Feb. 13th, 2017).
If your apps use Play Services like Firebase etc. you should change the minsdk version of your app to 14 or higher.
Since we can not address a special version of the play services and B4A always uses the latest one once you have updated your Android SDK to the new Google repository you will probably get an error if you have a minsdk version lower than 14 in your app and try to compile it.
Go to <sdk-installation-folder>\extras\google\m2repository\com\google\android\gms\play-services
There are many subfolders with version numbers. The latest currently is 10.0.1.
I guess they will release a new version next monday which will have version 10.2.0.