Upgrade ms-tpm-20-ref to f640b4bdb3a0fe944628e9f7df1362e2b9aa647d am: 6f9639fdfd am: 9143baa065 am: f81f03e331

Original change: https://android-review.googlesource.com/c/platform/external/ms-tpm-20-ref/+/1522559

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic12b57d65726dbf0fc4d73efe96371bfa2cafb5e