Merge "libdmabufheap: Export libbase headers" am: 29c004af4c am: 458185e799 am: 98a66d219e

Original change: https://android-review.googlesource.com/c/platform/system/memory/libdmabufheap/+/1500795

Change-Id: I20df2d10f178e794492dae2b70b1aded00c6c29a
tree: 440b33c7590c5f3efa338e5bd3095635749f9a74
  1. include/
  2. tests/
  3. Android.bp
  4. BufferAllocator.cpp
  5. BufferAllocatorWrapper.cpp