Fix ddms heap monitoring.

The bug was that the struct malloc_chunk 'head' field only contains a
chunk length if the bottom bits signify that the chunk is actually in
use. But rather than fix our logic, we can just call mspace_usable_size.

Change-Id: I10648f0486c19555061d0e4772668528dd8f076b
1 file changed
tree: 1607d821ee40e56dd08fb06be04b6962c26f9af1
  1. .gitignore
  3. build/
  4. jdwpspy/
  5. src/
  6. test/
  7. tools/