Updated SDK API version for amdroid to one that has the correct parcelable in framework.aidl.
The original merge request for ampache did not include the "fix" to add the android.os.Messenger parcelable to framework.aidl, this causes it to fail on the current selected SDK API version (19). The android.os.Messenger has been added to SDK API 21, so moving to that version fixes the build error.
I have checked that it compiles using a clean SDK and all compiles.