hwbcc: srv: initial rust server scaffolding am: 6480252c65

Original change: https://android-review.googlesource.com/c/trusty/lib/+/3377018

Change-Id: I98ef1ec45b6d1c98f8a0e059bafc72690e2f33ab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>