Fix C++20 build am: 693745f801

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/2858029

Change-Id: I0f03b31b16e1210a0f0cfd269d62ae6e14570141
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>