[Autofill PCC]: Fix Dataset creation from parcel.
When creating Dataset from parcel, it's possible to have null values in ids
and datatypes. This was causing crash. This CL fixes that.
Test: atest android.autofillservice.cts.unittests.DatasetTest
Manually tested regular flows.
Bug: 272405954

Change-Id: Ic51456933345079dc73be28dd454df9ed7fdce04
3 files changed