[hwkey] Add Rust interface for hwkey client

Adds Rust library functions that mirror the
interface provided by truster/user/base/lib/hwkey/include/hwkey.h

Test: build.py qemu-generic-arm64-test-debug --test="android-test:com.android.trusty.rust.hwkey.test"
Bug: 228897478
Change-Id: I6809699831b793d9a0587f2d219749aa323e8791
1 file changed
tree: 28e0e33f0a6d5ef0a2d3db1ba52e63bcb6444c19
  1. project/
  2. .clang-format
  3. LICENSE
  4. PREUPLOAD.cfg