libchrome: Export base/functional headers am: a78c30d256 am: 8ff21aa6e0

Original change: https://android-review.googlesource.com/c/platform/external/libchrome/+/2424171

Change-Id: I9e9dd6a8acfd5e44b4e1aea198355d73086d5167
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>