Trusty: no need to use libbase am: 5a9bbde400

Original change: https://android-review.googlesource.com/c/trusty/app/cast-auth/+/2855433

Change-Id: I16b38b5dd625fa43ba9c4126eb8acb4b634857e0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>