libdmabufheap: Add legacy_align to Alloc() interface for legacy ion use am: fb27952132

Original change: https://android-review.googlesource.com/c/platform/system/memory/libdmabufheap/+/1418856

Change-Id: I733a44e3e0ddb932f78208a4707ea1008b948312
tree: 660601061292abb22df49db9dfc5faf23c840279
  1. include/
  2. tests/
  3. Android.bp
  4. BufferAllocator.cpp
  5. BufferAllocatorWrapper.cpp