Add interfaceDescriptor to RecordedTransaction

This change adds a binder's interfaceDescriptor to RecordedTransaction.
While most Parcels self-identify with an interface descriptor, that is
not required. By adding the name of the interface that generated the
transaction, a RecordedTransaction and its Parcels can be more easily
decoded.

Test: `atest binderUnitTest`
Change-Id: I052640bf26ee3fa67a74a388ee4de930a684e2f4