Open libchrome visibility for otatools-package am: 7eb5cff5fa

Original change: https://android-review.googlesource.com/c/platform/external/libchrome/+/3528441

Change-Id: I9e34eb197f20c96d60cf854c444b73c01dbb6e9f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>