Added End-of-Parcel check API.

Added End-of-Parcel check API, that verifies there are no
bytes left to be read on the Parcel.

Test: atest -d android.os.cts.ParcelTest#testEnforceNoDataAvail
Bug: 195622897
Bug: 204990745
Change-Id: I3068568d8d4371b071aecd357adeb45a2d7103e4