Open libchrome visibility for otatools-package am: 7eb5cff5fa am: c08229f9c3

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

Change-Id: Ie7a29eb881bbc1cfd23765da66c95f5511000d34
Signed-off-by: Automerger Merge Worker <[email protected]>