libaidlmetadata: include hashes

So that we can test interfaces remain unchanged.

Bug: 140188086
Test: freeze android.hardware.vibrator interface and
    run vts_treble_vintf_test_all (which passes, finding the
    android.hardware.vibrator hash)

Change-Id: I08579f7031b184bcf0bbd00bd527542ed2aa9b7a
3 files changed