[km] Add a new rust binary for non-secure KeyMint host

The new binary sets non-secure RoT for keymint. The non-secure
version will be used on cuttlefish.

Bug: 355194622
Test: CF is gets booted with KeyMint TA in VM
Change-Id: Iff202c6d4bb70dabeb866b4f3fbc18c006bb219e
2 files changed