Merge "libdmabufheap: Export libbase headers" am: 29c004af4c

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

Change-Id: I9cce7cdfe480937559e57986abf0c88519535127
tree: 440b33c7590c5f3efa338e5bd3095635749f9a74
  1. include/
  2. tests/
  3. Android.bp
  4. BufferAllocator.cpp
  5. BufferAllocatorWrapper.cpp