Revert^2 "Only export unwindstack:: functions." am: f92dbdbb8e am: 34ea5707f4 am: 9921b7d696

Original change: https://android-review.googlesource.com/c/platform/system/unwinding/+/2862165

Change-Id: Ia481ee634e704b97db7b5beef1e11cbf56841b65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
tree: 19c0c15092f44c0b3e36bf651497a24aa54ee1df
  1. libunwindstack/
  2. OWNERS
  3. PREUPLOAD.cfg