dmabuf_heap_test: Use vendor api level in the tests am: b2b4ab7d86 am: 5075b3e7d6 am: 4bd24a7371

Original change: https://android-review.googlesource.com/c/platform/system/memory/libdmabufheap/+/1876005

Change-Id: Ia86416e331d0ac915acba7ec7a79db8ce5cd70b4
tree: 1b49526c9aa3300b0305f8c9d8564b097538f574
  1. include/
  2. tests/
  3. Android.bp
  4. BufferAllocator.cpp
  5. BufferAllocatorWrapper.cpp