Fix IRPCv3 pure software implementation am: e5fb905431

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/2481375

Change-Id: I0e48f5a279c99b526a6269b1184fe2d0a89036e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>