Implement getInterfaceHash/Version

As these interfaces get frozen, java services
implementing the interfaces are required to implement getInterfaceHash
and getInterfaceVersion [1]

[1]
https://source.android.com/devices/architecture/aidl/stable-aidl#new-meta-interface-methods

Bug: 190577319
Test: m
Change-Id: I6eaf60bfa5b852937d497697a769aab3eee2e2fd