trusty: reduce startup logging am: 7014e3b2fa

Original change: https://android-review.googlesource.com/c/trusty/app/keymint/+/3106914

Change-Id: Ie455c1b511aaf5419b9015f228dc66ae58f738fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>