As Adobe Mobile Services have been deprecated, you should migrate to the Adobe Experience Platform SDKs (also known as Adobe Experience Platform Mobile SDKs) for mobile app tracking and analytics.
The Adobe Experience Platform SDKs don't have a direct equivalent of the MobileServices.processGooglePlayInstallReferrerUrl(referrerStr) function. However, you can still track Google Play Install Referrer information by setting custom context data variables and then sending the data to Adobe Analytics.