Add HeapTest and make GC work enough to pass it

Change-Id: If06eaef2921b64b3226bfd347acaec60ec993e67
40 files changed
tree: a84122b3757b8f856eb0656a951ed6621b6d01a8
  1. Android.mk
  2. build/
  3. src/
  4. test/
  5. tools/