This CL will add "vtpm_proxy" option into the crosvm.
BUG=b:227283268
TEST=Build OK.
TEST=vmc start --vtpm-proxy termina # With crrev.com/c/3697690
Change-Id: I44c81abc1e2f41a80276f4de70e269c07eff901f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3696293
Commit-Queue: Leo Lai <cylai@google.com>
Commit-Queue: Yi Chou <yich@google.com>
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>