Add implementation of getInterfaceHash()

Exempt-From-Owner-Approval: cherry-pick from internal
Bug: 136065010
Test: m
Change-Id: I314f19aeca82cc8653eab71c9526ea7a208e6b50
Merged-In: I314f19aeca82cc8653eab71c9526ea7a208e6b50
1 file changed
tree: 60ad6bf3d9e8fde3bc35edad61d4b587cf73afe1
  1. core/
  2. services/
  3. tests/