Conditionally enable KeyMint tests am: f2e821ccba

Original change: https://android-review.googlesource.com/c/trusty/app/keymint/+/2958037

Change-Id: I8b9008bf5ac5848bbda07262fd433690b6712d98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>