Add marshal() and unmarshal() APIs.

Expose marshal/unmarshal APIs from binder_ndk because we need
to pass large data that exceeds binder memory limitation across
binder for auto use case. We need to serialize parcel to a shared
memory file and unmarshal it into a parcel. We would only marshal
stable AIDL generated parcelable.

Test: Add a unit test to CTS.
Bug: 197781220
Change-Id: I774663d619ad0ca04f23044d2245021b265b32c1