Sorry, there's no such connection between these various platforms and systems. I assume on the PC you're either referring to the Windows Metro app version of Music Maker Jam, or possibly to the fully-featured MAGIX Music Maker. If it's the former, the in-app store system in there is implemented via Mircosoft. So, there's no connection to Google Play Store or to MMJ virtual currency (Beatcoins) account (which is Android + iOS only). If we're talking about MAGIX Music Maker, this interfaces with MAGIX' own in-app store system. Again, there's no connection from this to Google's platform or to Music Maker Jam's whole community and virtual currency account system. These are all completely distinct systems. There used to be a workaround solution of MAGIX Music Maker downloading and installing MMJ styles when opening a Music Maker Jam (Android) project. However, the ability to do so in a current version is pretty questionable, since compatibility between MAGIX Music Maker and Music Maker Jam is no longer a point of priority.
Sorry. Hope this still sheds a little light on the situation.