There's two ways you can do that....
1. you export the private key on the PC client
2. on the android client you use the import keys function...and then resync....
i haven't actually tried this.... but it should work.
i've looked at the Android Client's /data/data/{appname} directory on my tablet and there seems to be quite a bit of difference in that data directory compared to the PC version.
If you know how to use Chroot Linux on Android, you can just directly copy the entire Data directory from the PC over into that directory on the Chroot Linux system. You won't have the nice NFC transfer functions as you'll have on android (how often do you really use that?) but it would be more simple (relatively)
If you need help setting up Chroot linux on Android (i use it every day on my TF201 tablet) let me know. i can hook you up with the APK installer and the rootFS image. You will need a rooted Android device though...