Add hashes for AIDL APIs

All frozen AIDL APIs are required to have a hash, and these are checked
for accuracy at build time. This ensures that these interfaces aren't
changed, since we are relying on their stability over time.

Bug: 149952131
Bug: 150154330
Test: m
Change-Id: I42ee68bcbb320ea2531144f81292675528b3038c