it is possibile to copy with the command pull an apk from /system/app/ ? I would copy the player music of my samsung and make the porting of xperia z, it possible this?
Get the list of the packages available:
adb shell pm list packages
Get the path of the APK of the specified package name:
adb shell pm path com.example.package
Get the APK with the path returned from the previous command:
adb pull <path_returned>