rpcbinder: Add Trusty server module

Add a Rust wrapper over RpcServerTrusty to allow
writing RPC Binder services in Rust.

Bug: 242243245
Test: trusty/vendor/google/aosp/scripts/build.py \
    --test "boot-test:com.android.trusty.rust.binder_rpc_test.test" \
    qemu-generic-arm64-test-debug
Change-Id: I55476c203c97f537a9f691cfafe72849e89a349b