As his question was about synching back play counts from the device I assumed that the counts were being tracked and stored somewhere on the device.
Is this not the case OP?
Marukomu (he owns A55) has said: "It is android based but I don't think you can install any apps on it. ".
OK. But that doesn't address whether the device stores the play counts in a database.
For example, when I used an iPod Touch, I couldn't scrobble from it. But i had a utility that would pull the play history from it. I did this once a week, and then uploaded that week's history to last.fm via the tool I referenced earlier.
Nothing to do with Android.
Nothing to do with installing any apps.
If it does track its own play counts, then he should be able to access them and get them to last.fm somehow.
If it does not track its own play counts, what was he asking about being synched back to MB in the first place?